Question

Solve the system of linear equations in two variables by elimination or substitution.

y=1 + x
2x+y=-2

Answer 1

Answer: x=-1, y=0

Explanation:

y=1+x

2x+y=-2

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#1 Elimination #2 Substitution

y=1+x y=1+x

2x+y=-2 2x+y=-2

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-x+y=1 2x+(1+x)=-2

2x+y=-2 2x+1+x=-2

--------------- 3x+1=-2

-2x+2y=2 3x=-3

2x+y=-2 x=-1, y=0

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3y=0

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y=0, x=-1

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