SOLUTION: Please help me solve this question -x+y=1 2x+y=-2 Solve using substitution method

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Question 713821: Please help me solve this question
-x+y=1
2x+y=-2
Solve using substitution method
Answer by BGutridge(15) About Me  (Show Source):
You can put this solution on YOUR website!
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++-1%5Cx+%2B+1%5Cy+=+1%2C%0D%0A++++2%5Cx+%2B+1%5Cy+=+-2+%29%0D%0A++We'll use substitution. After moving 1*y to the right, we get:
-1%2Ax+=+1+-+1%2Ay, or x+=+1%2F-1+-+1%2Ay%2F-1. Substitute that
into another equation:
2%2A%281%2F-1+-+1%2Ay%2F-1%29+%2B+1%5Cy+=+-2 and simplify: So, we know that y=0. Since x+=+1%2F-1+-+1%2Ay%2F-1, x=-1.

Answer: system%28+x=-1%2C+y=0+%29.