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2. Lesson Menu Five-Minute Check (over Lesson 3–2) Main Idea and Vocabulary Key Concept: Division Property of Equality Example 1:Solve Multiplication Equations Example 2:Solve Multiplication Equations Example 3:Real-World Example Example 4:Real-World Example

3. Main Idea/Vocabulary formula Solve multiplication equations.

4. KC 1 BrainPOP: Solving Equations

5. Example 1 Solve Multiplication Equations Solve 39 = 3y. Check your solution. 39 = 3y Write the equation. Answer: The solution is 13. Check 39 = 3y Write the original equation. 13 = 3(13) Replace y with 13. ? 13 = y 39 ÷ 3 = 13 39 = 39 Divide each side of the equation by 3.

6. 1.A 2.B 3.C 4.D Example 1 A.3 B.7 C.36 D.48 Solve 6m = 42. Check your solution.

7. Example 2 Solve Multiplication Equations Solve –4z = 60. Check your solution. Answer: The solution is –15. –4z = 60 Write the equation. Check –4z = 60 Write the original equation. –4(–15) = 60 Replace z with –15. ? z = 15 60 ÷ (–4) = –15 60 = 60 Divide each side of the equation by –4.

8. 1.A 2.B 3.C 4.D Example 2 A.–48 B.–4 C.4 D.80 Solve –64 = –16b. Check your solution.

9. Example 3 MAIL Serena went to the post office to mail some party invitations. She had $6.15. If each invitation needed a $0.41 stamp, how many invitations could she mail? WordsTotal is equal to cost of each stamp times number of invitations mailed. VariableLet n represent the number of invitations mailed. Equation6.15 = 0.41n

10. Example 3 Answer: Serena could mail 15 invitations. 6.15=0.41n Write the equation. 15=n 6.15 ÷ 0.41 = 15

11. 1.A 2.B 3.C 4.D Example 3 A.57 mph B.58 mph C.60 mph D.62 mph TRAVEL Jordan drove 273.6 miles in 4.8 hours. What was Jordan’s average speed?

12. Example 4 SWIMMING Ms. Wang swims at a speed of 0.6 mph. At this rate, how long will it take her to swim 3 miles? Answer: It would take Ms. Wang 5 hours to swim 3 miles. You are asked to find the time t it will take to travel a distance d of 3 miles at a rate r of 0.6 mph. d = rt 3 = 0.6t

13. 1.A 2.B 3.C 4.D Example 4 A.1.75 pounds B.2.5 pounds C.2.75 pounds D.4.11 pounds COOKIES Debbie spends $6.85 on cookies at the bakery. The cookies are priced at $2.74 per pound. How many pounds of cookies did Debbie buy?

14. End of the Lesson

15. Resources Five-Minute Check (over Lesson 3–2) Image Bank Math Tools Solving Equations Using Models Perimeter Solving EquationsTwo-Step Equations

16. 1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 3-2) A.12 B.22 C.74 D.84 Solve x + 31 = 53.

17. 1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 3-2) A.18 B.8 C.–8 D.–18 Solve –5 + y = 13.

18. 1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 3-2) A.3.2 B.15.6 C.30 D.164 Solve r – 7.2 = 22.8.

19. 1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 3-2) A.21 B.5 C.–5 D.–21 The sum of a number and 8 is –13. Find the number.

20. 1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 3-2) A.s – 17 = 152; s = 135 mph B.17 + s = 152; s = 135 mph C.s – 17 = 152; s = 169 mph D.17 + s = 152; s = 169 mph Using the table, write and solve an equation to determine Dale’s top speed at the racetrack if Dale’s top speed was 17 mph less than Andy’s.

21. 1.A 2.B 3.C 4.D Five Minute Check 6 (over Lesson 3-2) A.h = 1,582 – 34 B.1,582 – h = 34 C.1,582 + 34 = h D.34 = h + 1,582 The combined ages of the students in the 7th grade class at Sunnydale Middle School is 1,582. The combined ages of the students in the 8th grade class is 34 more than the combined ages of the students in the 7th grade class. Which equation can help you find the combined ages of the students in the 8th grade class?

22. End of Custom Shows