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Math Help - Please help me with algebra 2!!!

  1. #1
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    Post Please help me with algebra 2!!!

    9.

    15 + 9x-7
    = 9
    x x + 2
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by gnarlycarly227 View Post
    9.

    15 + 9x-7
    = 9
    x x + 2
    I'm assuming:

    \frac{15}{x} + \frac{9x-7}{x+2} = 9

    The common denominator is (x)(x + 2), multiply every term by it.

    15(x+2) + (9x-7)(x) = 9(x)(x + 2)

    15x + 30 + 9x^2 - 7x = 9x^2 + 18x

    15x + 30 - 7x + 9x^2 - 9x^2 - 18x = 0

    -10x = - 30

    x = 3
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