Sometimes we are given two linear equations, and we are asked to determine the point (if any) where the lines described meet, i.e cross one another; we called this the intersection point. There are three popular methods for doing this. They are: (a) substitution, (b) elimination and (c) graphing. In this module we examine the first of these - substitution.

With substitution, you solve one of the equations for one of the variables, and then substitute that quantity into the remaining equation. Let's watch the video to examine the method more closely.