Summary: Systems of Equations- Substitution

Systems of Equations- Substitution                        November 28, 2011

OBJECTIVE: SWBAT SOLVE SYSTEMS BY GRAPHING, ELIMINATION AND SUBSTITUTION

Today we learned about the three different types of systems of equations. The three methods are graphing, elimination and substitution. Today we focused on substitution and graphing. For substitution, it might be easier to use different colors and draw lines to separate the parts you have already done. You don’t have to do this; this is optional, but this usually helps others. There are four steps to remember when doing substitution. 1) Pick a variable-either x or y; 2) Solve the variable; 3) Substitute into an equation; 4) Combine Like Terms- CLT. An example is shown below on how to do this.  

EXAMPLE: