Hello

I know this is elementary, but I don't know how solve this:

The question is, find the exact value(s) of x which satisfy the equation.

I am not confident working with logarithms, although I do know the laws for the sum and difference of logarithms. I can do the other questions in this exercise, but not this one.

I know if the question was:

Then the answer would be:

Some help would be very much appreciated. Thank you.