# solve by the substitution method 5x+7y=6 -6x+y=21

29,281 questions

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.

asked by zwgz123 on December 15, 2017
2. ## 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

asked by Mia on March 2, 2010
3. ## 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

asked by Svetlana on October 17, 2006
4. ## Algebra 1

bobpursey, In this problem you helped me with earlier: Solve using any appropriate method. y = 2× - 5, y = ½× + 1 Substitution, substitute for y. 2×-5=½ × + 1 3/2 x=6 x=4 y= 2*4-5=3 How did you choose which method you were going to use between

asked by slomo on January 3, 2015
5. ## 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.

asked by Ma names Jeff on February 27, 2016
6. ## 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.

asked by DANIELLE on December 21, 2006
7. ## algebra

Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

asked by Anonymous on November 11, 2009
8. ## math

Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

asked by Amanda on November 11, 2009
9. ## math

Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

asked by Amanda on November 11, 2009
10. ## 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.

asked by Michael on October 6, 2008
11. ## Pre-Calc

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

asked by Anonymous on September 27, 2014
12. ## 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)

asked by Ashley on February 24, 2009
13. ## College Algebra

Solve for elimination method,substitution method and cramer's rule for 8x - 4y + 2z =16

asked by MJ on September 1, 2016
14. ## Math

How do I solve these problems, I really need help. Solve by substitution method 6x+5y=17 x=53-8y Solve by elimination method 2x+3y=5 4x+6y=10

asked by Amy on October 17, 2008
15. ## 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

asked by Margie on November 2, 2006
16. ## 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

asked by Amanda on February 18, 2008
17. ## Math

I need help,my example: The sales representative say there are two floor plans available 56 total houses. Use x for floor plan 1 and y for floor plan 2 then write an equation that illistrates the situation. So I thought x+y=56, then sales rep. says there

asked by dee on November 27, 2009
18. ## math

Solve by substitution method 9x+6y=21-9x+y=35 What is the solution of the method?

asked by micheal on June 16, 2009
19. ## math

Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=52-6y answer:-40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) 3.3x+4y=3 6x+8y=6 answer: No answer.

asked by deedee on January 6, 2009
20. ## 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

asked by Anonymous on January 29, 2014
21. ## college algebra

please solve by method of substitution 0.3x-0.4y-0.33=0 0.1x + 0.2y -.21=0 please give all steps to solve.I think I understand the basic concept but this is little more complicated for me. Thanks in advance

22. ## CALC 2 - Partial Functions!!

How do I solve Integral of 7/(16-x^2) I know I must break down (16-x^2) into (x+4)(-x+4), but after I do that what is next? Using the method of partial fractions, convince yourself that 7/(16-x^2)= (7/8)*[1/(4+x) + 1/(4-x)] The two additive terms can be

asked by Ace on June 13, 2007
23. ## algebra

use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y = 12 Why is the substitution method preferred in this case?

asked by Maya on April 5, 2011
24. ## math substitution method

use the substitution method to solve 7x+5y=-26 x=28-6y

asked by KiKi on March 28, 2010
25. ## math help quick please

solve {y=x-7 {5x+2y=7 Use the substitution method. A.(0, −7) B.(7, 0) C.(3, −4) D.(−1, −8)

asked by lily on February 6, 2017
26. ## algebra

x+3y=-10 7x-5y=34 solve using substitution method

asked by Anonymous on November 29, 2009
27. ## Algebra

Use the method of substitution to solve this: 9x+4y=9/2 and y=2x-1

asked by Amy on January 14, 2016
28. ## algebra

how do you solve by substitution method: 2x+2y+2=-18+6y-8?

asked by Carolyn on April 3, 2010
29. ## Math

Using the Substitution method solve 7x+5y=-23 -6x+y=25

asked by Bryant on March 21, 2010
30. ## math

Solve by substitution method: 3x+8y=33 x=31-6y

asked by anonymous on October 27, 2010
31. ## algebra

solve by substitution method: 9x+7y=4 x=23-4y

asked by Terri on November 24, 2009
32. ## Algebra

Solve using substitution method 3x+8y=20 x=24-7y

asked by Brandy on August 10, 2013
33. ## Algebra

Solve by using substitution method. 1. y=3x-2, x=4

asked by Brittany on January 22, 2009
34. ## math problem

solve by substitution method 7x+8y=44 x=41-5y

asked by Lavern on January 19, 2012
35. ## Algebra

How would you solve this using substitution method y= 3 + x 2x + y = 8

asked by Donna on February 16, 2011
36. ## math

Solve. y=x−8 2x+3y=1 use the substitution method. (4, −4) (5, −3) (2, −6) (0, −8)

asked by Jay on February 9, 2017
37. ## Pre-Calculus

asked by Anonymous on January 22, 2013
38. ## Math question

asked by DJ on January 20, 2012
39. ## Math

Solve using substitution method 2x-7y=-6 x=5y

asked by Tyler on October 1, 2009
40. ## Algebra

4x+y=42 6x-5y=50 Solve using the substitution method.

asked by Jamie on February 1, 2013
41. ## math

8m+n=12 m-5n=22 solve using substitution method

asked by Anonymous on June 30, 2010
42. ## Algebra

Solve using the substitution method. 0.3x+0.2y=5,0.5x+0.4y=11

asked by sherry on March 22, 2012
43. ## algebra

how do you use the substitution method to solve x + y =2 y = -2x

asked by Jessi on April 29, 2011
44. ## alg math 116

9x +3y=-51,-5x +y=39 solve using substitution method

asked by Juan on February 1, 2010
45. ## algebra

Solve by the substitution method. 2x+7y=16 x=22-7y

asked by Christina on August 13, 2012
46. ## Algebra

solve using substitution method: 4x+5y=21 x=48-6y

asked by Regina on October 25, 2015
47. ## college of the redwoods

x+9y=-42 3x+8y=-50 solve using the substitution method.

asked by paulette on November 9, 2015
48. ## math

solve using the substitution method: 8x+5y=-12 x=12-4y

asked by josh on April 17, 2011
49. ## Math 116

Solve by the substitution method. 3x+8y=57 x=67-8y

asked by Rick on August 14, 2010
50. ## Algebra 1

solve by the substitution method. 5x+9y=53 x=47-7y

asked by Anonymous on May 1, 2011
51. ## Algebra

x-2y=.9 4x-3y=13.1 Solve using the substitution method.

asked by Jamie on February 1, 2013
52. ## math - algebra

how would i solve this using the substitution method 3y=11-x 3x-y=3 thanks

asked by paul on November 14, 2010
53. ## college algerba

Solve by the substitution method: 2x - 3y = 7 y = 3x - 7

asked by Sammy on March 30, 2008
54. ## Algebra Help!!

solve using the substitution method. y= 5 - 3x 4x + y= 7

asked by slomo on January 11, 2015
55. ## Math/116 week seven

solve by the substitution method. 2m+n=1 m-9n=10

asked by Renee on March 4, 2012

Use substitution method to solve x-2y-5=0, 3x-5y=8

asked by Jeconiah on August 26, 2012
57. ## math

SOLVE USING SUBSTITUTION METHOD X+2Y =1 8X +6Y + 4

asked by HELEN on March 13, 2010
58. ## math

1) 6m+n=47 m-4n=12 can someone help me solve using substitution method?

asked by Kristin on March 13, 2010
59. ## Math

How do I solve this using substitution method? 7x+9y=-38 -6x+y=50

asked by Edith on February 11, 2012
60. ## Algebra

Use the substitution method to solve -x + 3y=24 5x +8y=-5

asked by Jake on March 23, 2012
61. ## College Algebra

solve by the the substitution method 8x+9y=-39

asked by Tiffany on February 2, 2014
62. ## Algebra

Please solve using substitution method. 2n-11=m/4 n=m/-3

asked by Emily on January 29, 2015
63. ## algebra

using the substitution method how do you solve y=-1/3x y+2x=5

asked by renee on April 13, 2011
64. ## Pre Calc

x^2+y=9, x-y+3=0. Need to solve using substitution method.

asked by Keith on May 18, 2010
65. ## math

solve by substitution method: 8x-3y=-94 2x+22=y

asked by Ralph on July 24, 2011
66. ## math

solve by substitution method x^2=y^2+39 x-y=3

asked by sue on February 25, 2009
67. ## math-need fast

solve by substitution method x^2=y^2+39 x-y=3

asked by anonymous on February 26, 2009
68. ## Algebra

solve using substitution method 3x-5y=61 3x-y=17

asked by Laura on January 25, 2011
69. ## substitution

solve by the substitution method 3x+5y=21 x=51-9y

asked by Sam on October 12, 2010
70. ## Math

How do I solve this using the substitution method? x+3y=8 3x-2y=2

asked by Anonymous on May 30, 2015
71. ## algebra

solve by the substitution method. 6x+3y=-21 -4x+y=41

asked by kim on February 24, 2012
72. ## Algebra

If 2x + 2y = 20 & 5x - 3y = 15 Solve using the substitution method.

asked by Jamie on June 20, 2015
73. ## Math

asked by Krista on May 16, 2010
74. ## paste

solve by the substitution method 3x+5y=21 x=51-9y

asked by William Tolson on October 12, 2010
75. ## algebra

Solve using the substitution method 6x-3y=18, 6x+3y=-12

asked by sharday on February 23, 2012
76. ## substitution

solve by the substitution method 3x+5y=21 x=51-9y

asked by Sam on October 12, 2010
77. ## Pre Calc

x^2+y=9, x-y+3=0. Need to solve using substitution method.

asked by Keith on May 18, 2010
78. ## Algebra

solve by substitution method y=x-4 6x-9y=21

asked by Anonymous on April 24, 2010
79. ## Math

Solve using the substitution method -x-3y=-20 5x+3y=40

asked by Chrissy on January 11, 2012
80. ## algebra

solve by substitution method 9x+7y=-23 x=48-8y

asked by anonymous ally on April 23, 2010
81. ## math

solve by the substitution method 5x+7y=6 -6x+y=21

asked by Jennifer on July 26, 2011
82. ## college algerba

Solve by the substitution method:

asked by Sammy on March 30, 2008
83. ## substitution method

Solve by substitution method please help me solve this. I do not know how to do this at all. The question is 3x+8y=33 and x=31-6y I know that I have to plug x into the first x like 3(31-6y)+ 8y = 33 but i do not know what to do from there.

asked by anonymous on October 27, 2010
84. ## 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 +

asked by Alyssa on April 5, 2011
85. ## math

Solve using the substitution method: 7x+2y=-37 and -5x+y=44 what are the solutions?

asked by tera on February 10, 2009
86. ## cant figure out

Solve by the substitution method. 7x+3y=1 AND -4X+Y=13 What is the solution.

asked by tera on February 10, 2009
87. ## math

1/4v=5 Use the substitution method to solve this problem.

asked by Janey on May 1, 2013
88. ## Math 208

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

asked by Jodie on January 6, 2011
89. ## algebra

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

asked by angela on July 14, 2013
90. ## Math

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

asked by Anonymous on January 29, 2014
91. ## algebra

Solve using the substitution method. -8x + y = 18 9x + 13y = 8

asked by Anonymous on January 13, 2015
92. ## maths

solve using substitution& elimination method 2x/5+3y/4=5;3x/10+5y/8=8

asked by nandhini on December 15, 2015
93. ## algebra

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

asked by Anonymous on January 13, 2015
94. ## algebra

solve for x using the substitution method -8x + y = 18, 9x + 13y = 8

asked by Anonymous on January 13, 2015
95. ## Algebra 2

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

asked by saRa on November 4, 2009

solve using the substitution method. -8x + y = 18 9x + 13y = 8

asked by slomo on January 11, 2015
97. ## Algebra Help!!

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

asked by slomo on January 11, 2015
98. ## math

solve the equation in substitution method 2m+n=0 m+2n=3

asked by damola on May 4, 2017
99. ## math

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

asked by hunter on July 3, 2013
100. ## algebra

solve by the substitution method 9x + 5y = -25 x = 7 - 3y Could someone help with steps here also?

asked by algebra yuck on September 12, 2009