SOLUTION: x=2y-12 what is the solution 4x-4y=-16

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Question 401201: x=2y-12 what is the solution
4x-4y=-16
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
x=2y-12
4x-4y=-16
First one is already solved for x, so where you see x in second equation plug in 2y-12 instead.
4(2y-12)-4y=-16
8y-48-4y=-16
4y-48=-16
4y=32
y=8
now go back up to first equation and wherever you see y plug in 8 instead.
x=2*8-12
x=16-12
x=4
So the solution is (4,8)
:)