Question 702028: -4x+2y=-20
-7x+8y=-8
Answer by sofiyac(983)   (Show Source):
You can put this solution on YOUR website! -4x+2y=-20 multiply this one by -4
-7x+8y=-8
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16x-8y=80
-7x+8y=-8 now add them
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9x=72 divide both sides by 9
x=8 now plug this into either of the original equations, i'll use first one
-4(8)+2y=-20
-32+2y=-20 add 32 to each side
2y=12 divide both sides by 2
y=6
(8,6)
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