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Math Help - Find x and AB

  1. #1
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    Find x and AB

    Given: AM = 2x+1, MB = 3x+2, and AB = 6x - 4

    Find: x
    and AB









    I got the answer for a type of question like this that consists of two terms. Unfortunately, I got lost trying to solve a question with 3 terms.

    I tried making them equal to each other 2x + 1 = 3x + 2. Then I would set the answer equal to 6x - 4 but that didn't work.

    The answers are x = 7 and AB = 38.
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  2. #2
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    Re: Find x and AB

    Okay, so I figured it out.

    I was supposed to do the following: 2x+1 + 3x+2 = 6x - 4

    5x - 6x = -3 - 4
    -x = -7
    x = 7

    then just substitute 7 into the x's.

    I'm sad that I couldn't get this first try. Sigh.
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