ABSTRACT
An equation states that two expressions have the same value. Expressions are what are on either side of the equation. Linear equations are the building blocks of algebra. The first step in converting word problems to equations is creating the necessary variables. Cross multiplication is an important technique for solving equations that contain fractions. In this technique, we multiply both sides of an equation by the denominators of the fractions within it. Doing so will remove the denominators and make the equation easier to solve. A set of multiple equations with the same variables is called a system of equations. When solving a proportional equation with two or more different units, make sure that the units in the numerators and the units in the denominators match up on both sides of the equation. Besides factoring, there is another way to solve quadratic equations.
