math

x=5-9y
4x+9y=-7

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  1. Now use (5-9y) for x in the second equation

    4 ( 5 - 9 y ) + 9 y = -7

    20 - 36 y + 9 y = -7

    I think you can take it from there.
    After you get y, go back to the first equation to get x

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    posted by Damon

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