## Lesson: One-Step Linear Equations

Introducing the Concept

Stress three important ideas when solving linear equations: (1) isolate the variable; (2) undo what was done to the variable by using the inverse operation; and (3) keep the equation in balance by doing the same thing to both sides of the equation.

**Materials:** a large poster to hang up in front of the class with the three ideas mentioned above listed on it

**Preparation:** Make the poster mentioned above. Make a picture on the board or on an overhead transparency of a balance scale to remind your students to keep the equation in balance.

Write the simple equation *x* − 3 = 4 on the board.