SOLUTION: 2x+y=1 x-y=11

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Question 135485: 2x+y=1
x-y=11
Answer by checkley77(12844) About Me  (Show Source):
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2X+Y=1
Y=1-2X
X-(1-2X)=11
X-1+2X=11
3X=11+1
3X=12
X=12/3
X=4 ANSWER.
Y=1-2*4
Y=1-8
Y=-7 ANSWER.
PROOF
4-(-7)=11
4+7=11
11=11