# solve the system of equations using the substitution method 8x - 9 = y, y - 8x = 4

47,180 results
1. ## Math

1. For the following system of equations, what is the x-value of the solution? -x+2y=6 6y=x+18 a. -18 b. 0*** c. -6 d. 3 2. Solve the following system of equations using substitution. What is the value of y? 2x+3y=105 x+2y=65 a. 15 b. 25 c. 40*** d. 65

2. ## How do I do this.?(Math.)

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second equation to solve for x:

3. ## Math (check plz)

y = 2x + 4 2x - y = 6 Solve the system of equations using substitution. A) (2,8) B) (2,-8) C) (10,24) D) no solution

4. ## Substitution Method in Algebra!HELP PLZ!

Use the Substitution method to solve the system of equations. 3x + y = 5 4x - 7y = -10 multiply first equation by 4 multiply second equation by 3 thus both equations have same x or y value in this case it is the x value. 12x + 4y = 20 12x - 21y = -30 solve

5. ## Pre-Calc

Solve the system of equations using either the substitution method or the multiplication/addition method answer: 3x+2y=14 2x-4y=4

6. ## Algebra

When is the substitution method a better method than graphing for solving a system of linear equations?

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the lines involved.

8. ## Algebra

Solve this system of linear equations. * Used the substitution method 3x - y = 8 4x - y = -15 ----------------------------------------- WORK y = 3x - 8 4x - (3x - 8 ) = -15 4x - 3x + 8 = -15 x + 8 = -15 x = -7 3x - y = 8 3(-7) - y = 8 -21 - y = 8 -y = 29 y

9. ## Math

1. Explain the advantages and disadvantages of both the substitution method and the elimination method for solving a system. Help please. The only reasons I can think of is because in substitution it might be more difficult cause there's a possibility of

10. ## algebra

Solve the following system using the substitution method: 6x - 2y = -4 y = 3x + 2

11. ## algebra

solve the system of equations using the substitution method 8x - 9 = y, y - 8x = 4

12. ## Substitution Method

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 x + y = -4 x - y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= -4 subtract two from each side, then divide each side by two to get y. Then, put

13. ## math

1. Solve for the indicated letter D=4e, for e The solution is e= 2. G(x) = 6/(6-5x) Choose the correct domain below {x|x is a real number and x ≠0} {x|x is a real number and x≠6/5} {x|x is a real number and x≥6/5} {x|x is a real number and x ≠6} 3.

14. ## Algebra

Solve by the substitution method. 2x + 4y = 8 -5x + y = 13 What is the solution of the ​system?

15. ## Algebra

-3x + 2y = 8 x + 4y = -4 use substitution method to solve the linear system.

16. ## Algebra

Solve the system of linear equations using the substitution method. 3x + 3y = 0 -6x + 9y = -10

17. ## algebra

use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)

18. ## Math

17) solve this linear system using the method of substitution. 2y-x=-10 y= -3/2x-1 20) simplify then solve by substitution 2(x-4)+y=6 3x-2(y-3)=13 just need help with these 2.

19. ## Math

I have to solve the system. 3x + y = 12 y = 9 - 3x I used the substitution method to get 3x + 9 - 3x = 12 But now I'm stuck.

20. ## Math

PLEASE CHACK MY ANSWER!!! Discussion for Applications of Linear Systems When solving a system of equations, how do you determine which method to use? My answer: I determine which method to use by looking at the equations. If both equations are in

21. ## algebra

Solve the following system using the substitution method: 3x + y = -3 y = 2x + 7

22. ## Algebra II

If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the third equation. 2x - 3y + z = -4 2x - 2y + z = -1 x - 2y + 3z = -6 5x + 7y = 6 y - 4 = -1 -y - 1 = -4

23. ## math

Solve the system of equations by Elimination OR Substitution. Explain why you chose one method over the other. 3x – 2y = 8 2x + 5y = -1

24. ## math written assignment help

A’s DJ service charges a \$200 setup fee and \$75 an hour after that. B’s DJ service charges no setup fee but costs \$125 an hour. (4 points) Set up equations for both of the services using x and y. Determine the variables and provide an explanation for

25. ## math

The difference between two numbers is 3. Eight times the larger number is 10 times the smaller number. Write a system of equations describing the given conditions. Then solve the system by the substitution method and find the two numbers.

26. ## math,algebra II

I need someone to explain to me step by step the process of this problem its in my book as an example but i am not understanding it. Ive researched the explanation of the ECHELON METHOD...BUt i am not seeingit...this is the problem that they have: Use the

27. ## math

solve by the substitution method. 5x + 7y= -19 x=4-4y what is the solution of the system?

28. ## algebra

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 +

29. ## math

solve the system of equations using the substitution method. y=2x-5 3x+4y=-9

30. ## Algebra

Solving system of linear equations by using the apropiate method name the method and the x,y coordinates 1)X=4y+8 2x-8y=-3 2)3x-7y=6 elimination method 2x+7y=4 (2,0) 3)5x-2y=12 elimination method 3x-2y=-2 (7,23/2) 4)9x-8y=42 elimination method 4x+8y=-16

31. ## Math

Solve the pairs of simultaneous equations by the substitution method. 5x-9y=17 3x-8y=5

32. ## Math

what are the pros and cons of the substitution method in a system of equations?

33. ## Algebra II

Explain, in complete sentences, which method you would use to solve the following system of equations and why you chose that method. Provide the solution to the system. x - 3y + 2z = -12 x + 2y + 3z = 6 2x - 3y - z = -2

34. ## Algebra Help!!

Solve the given system by the substitution method. 3x + y = 17 5x -2y = 10

35. ## math-linear equations

Its a story problem: The flying W Ranch raises only cows and horses. There are total 340 animals. The owner prefers horses to cows, so he has 52 more horses than cows. a. Write two different linear equations to model this situation. b. Solve the system of

36. ## Substitution Method-Plz help

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get it.How did you get that?What

37. ## Algebra

I can find no solution to this system of equations. Solve the system of equations using the substitution method 2x + 4y = -2 2x - y = 4

38. ## algebra

When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?

39. ## subsitution method

Can some one show me how to use the Substitution method to solve the system of these equations. x + y = -4 x - y = 2 x + y = 10 y = x + 8 on the first set. Solve for either x or y in either equation, then put that value into the other equation. Example: x

40. ## Algebra

Using the substitution method, what is the value of a in the solution to the system of equations below? a=3b+7 4a+9b=70

41. ## Geometry :(

this maths problem is wrecking my head.... 1.find the points of interesction of the line L and the circle k in the following L:x-2y=0 K:X Squared + y squared=25 I would solve both equations for y, and then you'll have a system with two equations and two

42. ## Math

How would you solve each system by the substitution method? 1. Y=6x-5 Y=-x+9

43. ## math

solve the system 3x-6y=5 and 2y=4x-6 using substitution method.

44. ## algebra

Use the substitution method to solve the linear system. Thanks! s= t+4 2t+s=19

45. ## Linear Equations

Can you please help solve this equation using the substitution method? I have tried and keep getting that X and Y = 7/2, but the answer in the book states no solution, inconsistent system. What am I doing wrong? Please help! Solve the systems of equations

46. ## algebra

solve the system of equations using the substitution method 8x - 9 = y y - 8x = -4

solve the system of equations using the substitution method 8x - 9 = y y - 8x = 4

48. ## Algebra

Solve the following system of equations using the substitution method:5x-7y=-18 and 4x+3y=20

49. ## algebra

What is the solution of the system? Solve the system of equations using the substitution method. x-y=-1 5x+4y=-23

50. ## math

If it says use the method of substitution to solve the system of linear equations 3a=6-b 3a=4-b How do i find the solution

51. ## College Algebra

solve each system by substitution method x=y+3 3x-2y=4 Pls determine whether the equations are independent, dependent, or inconsistent

52. ## Algebra1!Plz help I have test 2morrow!!!

so would the new eqaution be... 2x+8=10 then.. 2x=2 x=1? We know that y = x + 8. So if x + y = 10, then x + x + 8 = 10. but what about the y?ANd what do I do afetr that? If you know what x equals, then you can calculate what y equals. Once you've solved

53. ## algebra

Requesting help. (I must reckon, that X is a variable, and y is y-intercept) Q: Try to use the substitution method to solve the the linear system y=3x an y=3x-7. What do you notice? A) What happens when you graph it? B) Explain why there is no solution.

54. ## Math

1) x+2y=7, 2x-y=4 What I did: multiply 2x-y=4 by -2 so I could eliminate the y variable. -4x-2y = -8 + x +2y =7 = -3x =-1 Divided -1 by =1 and got x=1/3 I only need someone to check my answer. Also one last question, can I use the elimination method for

55. ## Math

Use the substitution method to solve the following system of linear equations: x + y = 6 x = –y + 2 A. There are an infinite number of solutions. B. The solution is (2, 4). C. The solution is (4, 2). D. There is no solution.

Thanks,what abou this one? Use the Substitution method to solve the system of equations. x + y = 10 y = x + 8 follow the same principle for the first one and u'll get it u already have y = x + 8 Subst. that in the first eqn and just follow up from there

57. ## math

The perimeter of a rectangular cattle enclosure is 400 feet. It is 40 feet longer than it is wide. Using a system of equations solve for the length and width of the enclosure using the substitution method.

58. ## Algebra Multiple Choice

Hello, This is the last of questions I have for my practice assignment. Again I will put what I got. Thanks for your help. 1.) Solve the system using substitution. Write answer as an ordered pair. 4x+2y=8 -5x-2=y A.) First equation (-2,8) B.) Second

59. ## algebra

Solve the given system by the substitution method. 2x+y=6, 5x-2y=6

60. ## algebra

Use the method of substitution to solve the system. xy=1 4x-y+3=0

61. ## alegebra

solve this system of equation using the substitution method. 6x+8y=72 2x+5y=45

63. ## Algebra 1 HELP PLZ!!!

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 PLz HELP!! I'M NOT BOB BUT I CAN HELP ITS REALLY SIMPLE ALGEBRA X + Y = -4......EQN 1 X - Y = 2.....EQN 2 From EQN 2, let x = 2 + y Substitute that into EQN 1 x - y = -4

64. ## calculus

When using the substitution method to solve a nonlinear system of equations, you should first see if you can _____ one variable in one of the equations in the system.

65. ## algebra

Can someone help me figure this out please? when you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? thank you anyone

66. ## algebra

Can someone please help. When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? Thanks

67. ## algebra

when you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent?

68. ## Algebra 1

solve the system of equations using the substitution method. 8x-9=y, y-8x=-4

69. ## Algebra

Solve the system of equations by the substitution method X+9y=32 2x+4y=8

70. ## Algebra

Solve the system of equations by the substitution method {y=1.2+3.8 {Y-0.5x-2.99

71. ## precalculus

can you check my work? Solve the system of equations at the right by the method of substitution. Verify your results by using a graphing utility. x^2+y^2-4x+6y-5=0, x+y+5=0 x=-y-5 (-y-5)^2+y^2-4(-y-5)^2+6y-5=0 y=√5-5, y=-5-√5 x+√5-5+5=0 x=-√5

72. ## Pre-Calculus

I have to use the substitution method to solve the system of equations. 4x-y=9 and 2x+3y=12 I worked this problem myself and could not find a possible solution. So I put that it is inconsistent. Is that correct? If not could you please help me?

73. ## Algebra question

When you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent? If your variables disappear as you simplify, and you end up with 0=0 (or k=k) the system is dependent. (really just the same

74. ## precalculus

Solve the system of equations at the right by the method of substitution. Verify your results by using a graphing utility. x2+y2-4x+6y-5=0, x+y+5=0 answer: x=-y-5 (-y-5)2+y2-4(-y-5)2+6y-5=0 y=√5-5, y=-5-√5 x+√5-5+5=0 x=-√5 x-5-√5+5=0 x=√5

75. ## quick question regarding equations

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to

76. ## math

how do i solve two step equations? Do you mean two equations in two unknowns? The method of substitution is one way. There is a good tutorial here: http://www.themathpage.com/alg/simultaneous-equations.htm

77. ## math ALGEBRA

Solve by either the substitution method or the addition or subtraction method 2m=n-3 3m=2n-9 Just replace n with (2m + 3) in the second equation. Then solve for m. Once you know the value of m, use either of your equations, such as n = 2m+3, to get n.

78. ## Algebra II

How do you solve the linear equations x+y=5 3x-y=3 by use of the Substitution Method? (Please do not confuse with the Elimination Method)

Produce an example of a system of equations to your fellow students and allow them to respond on which method (graphing, substitution, elimination, matrices) they would choose for solving your systems of equations. Be sure to reply to students' responses

80. ## math

solve each system of equations by substitution. y=3x-9 please help explain how to solve this using substitution.

81. ## Pre-Algrebra

Two cell phone companies have different rate plans. Runfast has monthly charges \$10 plus \$4 per gig of data. B A &D’s monthly charge is \$6 plus \$6 per gig of data. Your task, is to determine under what circumstances each company has the better pricing.

82. ## algebra

How would you solve the systemof equations using the substitution method: 2x-9y=2 4x+18y=12

83. ## Algebra

7x + 5 = y 3.5x + 20 = y Solve the system of equations. What method did you use to solve the system and why? Show your work. Can someone please explain to me the process of solving the system? That would be nice. Thanks! (=

84. ## MATH

What is the p.o.i for these set of equations (the substitution method) 2x+y=6 3x+2y=6 i tried to solve this many times but i keep getting different answers. What does x= and what does y=?

85. ## Algebra

A rectangular garden is 54 feet longer than it is wider. Its perimeter is 292 feet. Write a system of linear equations whose solution gives the width and length of the garden. Use the substitution method to solve and check your answer.

86. ## Algebra 2

Solve the system by the substitution method. 5x+7y=-18 y=5x-14

87. ## 0303 math

Solve the system by the substitution method y=-2x-4 5x-2y=-1

88. ## algebra 2

Solve the system by the substitution method 5x+7y=-18 y=5x-14

89. ## Math 208

Solve each system by the substitution method. x+3y=2 -x+y=1

90. ## algebra

Solve the given system by the substitution method. 3x + y = 17 5x -2y = 10

91. ## math

Solve the following system using the substitution method: 2x + 4y = 5 x = -2y + 6

92. ## college

solve the system by the substitution method x=8-4y 3x=5y=3

93. ## Math

Solve the system by using the substitution method. y= 3/4x - 4 -x + 2y= -6

94. ## math

Solve the following system using the substitution method: y = 3x - 9 y = -x - 1

95. ## Algebra II

What is the first step for solving this system by substitution? DO NOT SOLVE!! 3x-2y=8 x+7y=10 How many solutions does this system of equations have? 3y-6x=12 y-2x=4 My answer is 1 solution. Is this correct?

96. ## Math

I still don't know how to directly solve this problem. Can someone guide to solve this system of equation by using the substitution method? Thanks! 1. Y=6x-5 Y=-x+9

97. ## Algebra

Solve by the substitution method 8 m + n=1 M-4N=29 What is the solution of the system

98. ## math

Use a substitution method to solve the linear system 2a=8 a+b=2

99. ## math

Solve by the substitution method. What is the solution of the system? 3x+9y=48 -6x+y=56

100. ## Algebra

Use the substitution method to solve the linear system. 1/8p+3/4q=7 3/2p-q=4 Thanks.