Students learn how to set up an equation using written descriptions and known geometrical facts.

Later, as learning progresses they use the balance method to solve the equations

**Differentiated Learning Objectives**

- All students should be able to set up and solve an equation in the form x ± a = c
- Most students should be able to set up and solve an equation using written descriptions.
- Some students should be able to set up equations by simplifying expressions.