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Math Help - Need Help. Confusing Equation

  1. #1
    Newbie
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    Need Help. Confusing Equation

    The gievn equation is: -

    P+Q = a (P-Q)

    How can get this form: Q = {(a-1) / (a+1)}P from the above equation?
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  2. #2
    Super Member TheChaz's Avatar
    Joined
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    Northwest Arkansas
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    You'll need to get all terms with a "Q" in them on one side.
    P + Q = aP - aQ
    P + aQ + Q = aP
    aQ + Q = aP - P
    Factor!
    Q(a + 1) = P(a - 1)
    Divide by (a + 1)
    Q = P *\frac{a - 1}{a + 1}
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