1. Section 4-1: Introduction to Linear Systems

2. To understand and solve linear systems.

3. A system of equations or inequalities is a set of open sentences each of which contains the same variables.

4. The solution set of a system with two variables is the set of all ordered pairs that satisfy all the open sentences in the system.

5. Section 4-2: Solution of Systems of Linear Equations

6. Given a system of two linear equations in two variables, solve it by transforming it to an equivalent system of the form: x= constant y= constant

7. Solve the system: