Solving Systems of Linear Equations

10-22-08IMP3Ms. Sia

Today’s Agenda

Bell ringer Report out sheets Get the Point p. 42

Announcements

Last day I’ll accept extra credit is Friday, October 31st

HW Hall today and tomorrow until 4:30pm

ACT math session tomorrow during 8th and 9th periods in the library

Report Out sheets

Get the Point p. 42

System of linear equations: a set of two or more linear equations with common solutions

We already know TWO methods: Guess and check Graphing

Today, we’re learning the substitution method.

Substitution

1. Solve one of the equations for a variable.

2. Plug your resulting expression into that variable in the other equation.

3. Solve that other equations for the other variable.

4. Plug that value into either equation and solve to get the value of the other variable.

Example

Tonight’s HW

HW16 p. 47 and HW17 p. 48 are due Monday, October 27th