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5 July, 07:41

Log4 (x) + log4 (x-3) = log4 (-7x+21)

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  1. 5 July, 08:17
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    Log4 (x (x-3)) = Log4 (-7x+21)

    Log4 (X the power of two - 3x) = Log4 (-7x21)

    X the power of two - 3x=-7x+21

    x=3, x=-7.
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