1. Warm – Up
On your white board, model the following equation:
2x – 4 = 6
= x = = -1

3. Now… Time for Simple Algebra 

4. x + 4 = -2 Modeling Algebra Follow the same steps
Draw a model for the equation
x = -2
Add the opposite of the constant to both sides
x = -2
+(-4)
x = -2
+(-4)
Cross out ZPs on both sides
x = -6 =
Solve and check

5. 2x + 1 = -3 Modeling Algebra Follow the same steps
Draw a model for the equation
2x = -3
2x = -3
+(-1)
Add the opposite of the constant to both sides
2x = -3
+(-1)
Cross out ZPs on both sides
2x = -4
Solve and check
x = -2

6. On your White Board …
Solve this with models and algebra…
2x – 4 = 2

7. On your White Board …
Solve this algebraically…
3x – 36 = -6

8. Balance Scale

9. Cups and Beans