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12 January, 16:34

solve this system of linear equations. sperate the x - and y - values with a comma. 2x = - 78 - 20y and - x = - 51 - 20y

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  1. 12 January, 19:58
    0
    (-9, - 3)

    Step-by-step explanation:

    Isolate the variables to one side:

    2x + 20y = - 78

    -x + 20y = - 51

    Subtract the equations:

    3x = - 27

    Divide:

    x = - 9

    Plug it back in:

    9 = - 51 - 20y

    Solve:

    60 = - 20y

    y = - 3

    Check:

    -18 = - 78 - (-60)

    -18 = - 18

    YAY YOU'RE DONE!
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