SOLUTION: -x+4y=-11 2x+4y=-2

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Question 200119: -x+4y=-11
2x+4y=-2
Answer by checkley77(12844) About Me  (Show Source):
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-x+4y=-11 multiply this equation by 2 & add them
2x+4y=-2
-2x+8y=-22
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12y=-24
y=-24/12
y=-2 ans.
2x+4*-2=-2
2x-8=-2
2x=-2+8
2x=6
x=6/2
x=3 ans.
Proof:
2*3+4*-2=-2
6-8=-2
-2=-2