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Solve (1/81) ^x = 243^x-9

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  1. 13 March, 01:03
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    x=5

    Step-by-step explanation:

    (1/81) ^x = (243) ^x-9

    (1/3^4) = 3^5 (x-9)

    3^-4x=3^5 (x-9)

    -4x=5 (x-9)

    -4x=5x-45

    -4x-5x=-45

    -9x=-45

    x=5
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