Supply and Demand
In this lesson, students write and solve a system of linear equations in a real-world setting. Students should be familiar with finding linear equations from 2 points or from the slope and y-intercept. Graphing calculators are not necessary for this activity, but could be used to extend the ideas found on the second activity sheet.
Solve Linear Equation Systems Step by Step
This is an interactive tool that will solve systems of linear equations containing up to seven variables.