What you posted isn't even an equation, how can it have solutions?
http://http://www.germanna.edu/tutor..._exponents.pdf
heres the link.
The problem is
I know how the got their answer. BUT it is wrong.
If you look at that expression we see that but can be any real number.
Now why is it incorrect? Let the given expression evaluates to .
BUT . To be equal the values must be the same.
Here is the mistake. They said . BUT IT DOES NOT.
This is what is correct: .