SOLUTION: Find the values of and that solve the following system of equations: 3x-4y=20 -8x-5y=25

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Question 317305: Find the values of and that solve the following system of equations:
3x-4y=20
-8x-5y=25
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
3x-4y=20 multiply by 8
-8x-5y=25 multiply by 3 & add.
24x-32y=160
-24x-15y=75
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-47y=235
y=235/-47
y=-5 ans.
3x-4*-5=20
3x+20=20
3x=20-20
3x=0
x=0
Proof:
-8*0-32*-5=160
0+160=160
160=160