We already know a lot about fractions. We know how to simplify them and we also know how to add, subtract, multiply, and divide. In this unit, we will develop these ideas for fractions that involve variables. We will also learn how to solve equations involving fractions with variables (including equations with extraneous solutions). Note: In this unit, we will use an algebraic approach to rational expressions. Graphing rational functions is not covered as part of this unit.