Hello, GoodLuckMe!

The procedure is:

. . Express all exponential in the same base.

. . Equate exponents.

. . Solve for

I'll do the last one.

We note that: .

So we have: .

. . . . . . . . . .

. . . . . . . . . . .

. . . Then: . .

. . . . . . . . . . .

. . . . . . . . . . . . .