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Math Help - [SOLVED] reviewing logs

  1. #1
    cltwolves
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    [SOLVED] reviewing logs

    4 times 3 to x power = 7 times 5 to x power. solve for x using logs
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by cltwolves View Post
    4 times 3 to x power = 7 times 5 to x power. solve for x using logs
    4 3^x = 7 5^x

    take logs

    log(4)+x log(3) = log(7) + x log(5)

    so:

    x = (log(7)-log(4))/(log(3)-log(5))

    RonL
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