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Math Help - absolute value equation

  1. #1
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    absolute value equation

    I need help solving

    13-|x+7|=4

    and it needs 2 points for the answer..help!
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  2. #2
    MHF Contributor red_dog's Avatar
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    13-|x+7|=4\Leftrightarrow |x+7|=9
    Then, x+7=9 or x+7=-9
    Now, solve both equations and find x.
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