See the explanation below.
I'm not sure if this is the exact question, I added a minus sign. But this is a similar question.
We will apply the following log law twice to solve for x:
First, see if you can simplify large numbers and write them in index form:
Apply the log law to the left hand side:
Bring both terms to the same side and apply the log law again:
Write the log expression in it's equivalent exponential form and then solve for x: