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9 August, 09:52

4x+9y=9/:and/:2x-9y=-63

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  1. 9 August, 10:04
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    Solve through linear combination

    4x+9y=9

    + 2x-9y=-63

    6x = - 54

    So, you get the equation 6x=54, and by diving by 6 on each side of the equation you find that x=9

    Plug this into one of the original equations to find y.

    4 (9) + 9y=9

    36+9y=9

    9y=-27

    y=-3

    Now we know that x=9 and y=-3, so the solution to this system of equations is (9,-3)
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