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 3x = 1. That's just a linear equation, so you can solve it and get x = 1 ⁄ 3.