To teach the technique of solving linear systems of equations by substitution.
This packet contains a slide show introducing the concepts of linear systems and their solutions, as well as a short video in which an example system is solved.
This presentation introduces the substitution method to the learner. It consists primarily in a worked example.
Source: Colin O'Keefe
This video includes a short example of solving a linear system using the substitution method.
Source: youtube.com, Colin O'Keefe