June 1, 2012

In this lesson we build upon student experience with graphing and solving systems of linear equations from middle school to focus on justification of the methods used. We rove that given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.

- Mathematics > General
- Mathematics > Algebra

- Grade 6
- Grade 7
- Grade 8
- Grade 9
- Grade 10

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).