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24 July, 23:10

Solve 3^2y-2=81^2y+1

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  1. 25 July, 00:37
    0
    y = - 1

    Step-by-step explanation:

    Solve 3^2y-2=81^2y+1

    3^ (2y - 2) = 81^ (2y + 1)

    3^ (2y - 2) = (3^4) ^ (2y + 1)

    3^ (2y - 2) = 3^ (4 * (2y + 1))

    3^ (2y - 2) = 3^ (8y + 4)

    2y - 2 = 8y + 4

    2y - 2 - 4 = 8y

    -6 = 6y

    y = - 1
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