math
Can someone please check my work?
Solve using substitution method
1. 3x+2y=12
x=526y
answer:40.8 I am pretty sure that one is wrong.
Solve using elimination method
2. 2r7s=31
7r+2s=24
answer: (230/53,468/53)
3.3x+4y=3
6x+8y=6
answer: No answer. problems eliminate eachother
asked by
deedee

3(526y) + 2 y = 12
156  18 y + 2 y = 12
16 y = 144
y = 9
x = 52  6(9) = 52  54 = 2
posted by Damon

Thank you Damon!
Can you help me with the formula to solve by elimination?posted by deedee

3x+2y=12
x=526y multiply everything by 3 on this line
3x+2y=12
3 x = 156  18y
 subtract
0 x + 2y = 12 156 + 18 y
0 =  144 + 16 y
y = 144/16 = 9 againposted by Damon

2r7s=0
7r+2s=53posted by Anonymous

6,174,000,000
posted by mani
Respond to this Question
Similar Questions

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 
algebra
Solve for s in this equation. Depreciation. D=Cs/n This is my answer DC=Cs/nc DC=s/n n(DC)=s/n*(n) nD+nC=s s=n(CD) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement 
math check answer
Solve by elimination method 3x  6y =4 3x  6y =5 is the answer x=9 and I think it is inconsistant and not consistant 
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 
math
Solve by elimination method. 2r5s=33 5r+2s=48 Solve by substitution method. 5x+6y=5 x9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it.. 
math
Solve by elimination method. 2r5s=33 5r+2s=48 Solve by substitution method. 5x+6y=5 x9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it.. 
introductory algebra
I had these problems on my test and for some reason got them wrong. Here are the problems: Solve: xy=9 x+y=1 The test states that the answer is (5,4) I've checked ,y work and used substitution to solve this and still get x=4, 
Algebra PLEASE HELP!!
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 
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 
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*45=3 How did you choose which method you were