SOLUTION: y=9-x x-y=7

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Question 120017: y=9-x
x-y=7
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
I bet you are trying to find the value of x and y.

we know that y=9-x
but,
x-y=7
so,
x-(9-x)=7
x-9+x=7
x+x-9=7
2x-9=7
2x-9+9=7+9
2x=16
x=8
Solving for y,
y=9-8=1

Thus, the equations are true if and only if x=8 and y=1

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HyperBrain!