Maths

Find out X

25^x=1/^3square root 5

27^x+5=9^2x-1

8x16^x-1 =4^3x

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  1. The first one contains a typo and makes no sense

    2nd:

    I bet you mean:
    27^(x+5) = 9^(2x-1)
    then ...
    (3^3)^(x+5) = (3^2)^(2x-1)
    3^(3x+15) = 3^(4x-2)
    3x + 15 = 4x - 2
    -x = -17
    x = 17

    3rd:

    8(16^(x-1) = 4^(3x)
    (2^3)(2^(4x-4) = 2(6x)
    2^(4x-1) = 2^(6x)
    4x-1 = 6x
    -2x = 1
    x = -1/2

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