Learn how to simplify expressions that have variables. This site offers a variety of video lessons, from a teacher and several students, showing step-by-step solutions to twenty-four different expressions.

This QuickTime movie provides another opportunity to simplify an expression by combining like terms. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.

This QuickTime movie provides an opportunity to see how easy it is to simplify an expression by combining terms. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.