1. Solving Two-Step Equations

2. Algebra Tiles

3. Variable Zero Pairs

4. Zero Pairs

5. Example 1

9. Check our work -5 = 2x + 1 -5 = 2(-3) + 1 -5 = -6 + 1 -5 = -5

10. Example 2

11. Let’s check our work: 3x – 2 = 4 3(2) – 2 = 4 6 – 2 = 4 4 = 4

12. Example 3

13. Let’s check our work: 2x + 1 = 5 2(2) + 1 = 5 4 + 1 = 5 5 = 5

14. Steps for solving Get the variable term by itself. In other words, do the addition/subtraction first. Isolate the variable. In other words, do the multiplication/ division last. *****HINT! Whatever you do to one side of the equation you MUST do to the other side!

15. Example 2x + 3 = 7 *Get the variable term alone* -3 -3 “undo” addition by subtraction 2 x = 4 *Isolate the variable* 2 2 “undo” multiplication by division x = 2

16. Solve + 4 = 9 + 4 = 9 - 4 - 4 (Subt. 4 from both sides)  3 = 5  3 (Mult. by 3 on both sides) x = 15 = 5

17. a)3x – 5 = 16 b)12 = 13 + c)16 = 4n + 4 d) – 6 = 4 Try These Problems y = -4 x = 7 n = 3 n = 20

18. Time to Review! Keep the equation balanced. Use inverse operations to “undo” Follow the rules: 1.Undo Addition or Subtaction 2.Undo Multiplication or Division

19. Practice Worksheet