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

Question 713821: Please help me solve this question
-x+y=1
2x+y=-2
Solve using substitution method
Answer by BGutridge(15) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving 1*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=0. Since , x=-1.

Answer: .

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