# 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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