You may want to review exponents and linear equations first.

You can solve equations with exponents. For example, suppose you
have to solve (1 ⁄ 13)^{3x} =
1 ⁄ 13. We know that
(1 ⁄ 13)^{1} =
1 ⁄ 13, so 3*x* = 1. That's just a linear
equation, so you can solve it and get *x* =
1 ⁄ 3.