Algebra 1

{3x+y=-9
{-3x+-2y=12

What is the y-value of the solution to this system of equations?
A. -7
B. -3
C. -2
D. -1

I tried them all and I must have did something wrong because none of them worked. Help please!! Thanks.

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  1. must have done

    since 3x+y = -9,
    -3x = y+9

    using that, we have

    (y+9)-2y = 12
    -y = 3
    y = -3

    It would have helped had you shown your work.

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  2. My work is on a piece of paper. Kinda hard to show that.

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