Suppose you are right and the answer is 'x = -8'.

Plug in the value for x = -8 to see if you will get identity:

Since -1 does not equal -5 follows x = -8 is not the solution.

Lets check if 'x = -32' is the solution:

We got identity, -5 = - 5 and 'x = -32' is indeed the solution.