1. Lesson 3-5 Pages 120-124 Solving Two-Step Equations Lesson Check 3-4

2. What you will learn! How to solve two-step equations.

3. Two-step equation

4. What you really need to know! A two-step equation contains two operations. To solve, use inverse operations to “undo” each operation in reverse order. First “undo” addition / subtraction. Then “undo” multiplication / division.

6. 3x +0 = 21 3x = 21 Example 1: Solve 3x – 4 = 17 + 4 33 x = 7

7. Example 2: Solve

9. Example 3: The formula F = 1.8C + 32 can be used to convert Fahrenheit degrees to Celsius degrees. Solve the equation to find the equivalent Celsius temperature for 59°F.

10. Example 3: 59 = 1.8C + 32 - 32 27 = 1.8C 1.8 15 = C 15°C

11. Example 4: x 5 - =7 -2 = x

12. Example 5: b – 3b + 8 = 18 -2b + 8 = 18 -2b = 10 b = -5

13. Page 122 Guided Practice #’s 3-12

15. Pages 120-122 with someone at home and study examples! Read:

16. Homework: Pages 123-124 #’s 14-48 even #’s 52-74 Lesson Check 3-5

21. Page 729 Lesson 3-5

22. Lesson Check 3-5