Asked by Janae

4^x-1=64
Answered by Graham
Did you mean?:
4^x -1 = 64
4^x = 63
x log(4) = log(63)
x = log(63)/log(4)

Or did you mean?:
4^(x-1) = 64
4^(x-1) = 4^3
x = 2
Answered by Janae
thanks i got 2, too.

5^x + 10 = 15
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