I have a problem that reads as:
And when solved the answer is (2,-2), but I checked the answer in the back and it says (6,-6)
How does that WORK??

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  1. if you add the two equations, the x's cancel out, and you have

    6y = -12
    y = -2
    so, x=2.

    The book answer is wrong.

    (6,-6) fits the 2nd equation, but not the 1st.

    If the 1st equation were -4x-2y = -12
    then (6,-6) would be correct.

    So, it appears that the problem has a typo.

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