1. 3.3 Solving Equations by Using Multiplication and Division Multiplication Property of Equality –If each side of an equation is multiplied by the same number, the resulting equation is true. –For any numbers a, b, and c, if a = b, then ac = bc.

2. Solve using Multiplication by a Positive Number Solve

3. Solve using Multiplication by a Fraction Solve

4. Write and Solve an Equation Using Multiplication On July 20, 1969, Neil Armstrong stepped on the surface of the moon. On the moon, his suit and life-support backpacks weighted about 33 pounds. The weight of anything on the moon is about one- sixth its weight on earth. What is the weight of Neil Armstrong’s suit and life-support backpacks on earth? Let w = the weight on Earth The weight of Neil Armstrong’s suit and life-support backpacks on Earth was about 198 pounds.

5. Division Property of Equality Multiplication Property of Equality –If each side of an equation is divided by the same nonzero number, the resulting equation is true. –For any numbers a, b, and c, if a = b, then a/c = b/c.

6. Solve using Division by a Positive Number Solve 13s = 195. Then check your solution. 13s = 195 s = 15 Check: 13s = 195 13(15) = 195 195 = 195 The solution is 15.

7. More Practice!!!!! Homework – Worksheet 3.3.