SOLUTION: solve using the elimination method. x-y=3 -3x+y=7

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Question 203844: solve using the elimination method.
x-y=3
-3x+y=7
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x=y+3
-3(y+3)+y=7
-3y-9+y=7
-2y=16
y=-8
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x-y=3
x+8=3
x=-5
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-3x+y=7
-3(-5)-8=7
15-8=7