Download presentation

Published byDarrell Price Modified over 6 years ago

1
Warm Up Solve. 1. x + 5 = 9 2. x – 34 = 72 = x – 39 x = 4 x = 106 x = 163

2
**Learn to solve one-step equations by using multiplication or division.**

3
Vocabulary Multiplication Property of Equality – you can multiply both sides of an equation by the same number and the statement will still be true Division Property of Equality – you can divide both sides of an equation by the same number and the statement will still be true

4
**• 2 5 10 = 10 5 2 ÷ = Like addition and subtraction, multiplication**

and division are inverse operations. They “undo” each other. 2 • 5 10 = 10 5 2 ÷ =

5
If a variable is divided by a number, you can often use multiplication to isolate the variable. Multiply both sides of the equation by the number.

6
**Additional Example 1: Solving an Equation by Multiplication**

Solve the equation = 13. Check your answer. h 2 h 2 = 13 h 2 (2) = 13(2) Think: h is divided by 2, so multiply both sides by 2 to isolate h. h = 26 Check h 2 = 13 26 2 ? = 13 Substitute 26 for h. 13 = 13 ? 26 is a solution.

7
** Check It Out: Example 1 Solve the equation = 30. Check your answer.**

5 Solve the equation = 30. Check your answer. x 5 = 30 x 5 (5) = 30(5) Think: x is divided by 5, so multiply both sides by 5 to isolate x. x = 150 Check x 5 = 30 150 5 ? = 30 Substitute 150 for x. 30 = 30 ? 150 is a solution.

8
You cannot divide by 0. Remember!

9
If a variable is multiplied by a number, you can often use division to isolate the variable. Divide both sides of the equation by the number.

10
**Additional Example 2: Solving an Equation by Division**

Solve the equation 51 = 17x. Check your answer. 51 = 17x Think: x is multiplied by 17, so divide both sides by 17 to isolate x. 51 = 17x 17 17 3 = x Check 51 = 17x 51 = 17(3) ? Substitute 3 for x. 51 = 51 ? 3 is a solution.

11
Check It Out: Example 2 Solve the equation 76 = 19y. Check your answer. 76 = 19y Think: y is multiplied by 19, so divide both sides by 19 to isolate y. 76 = 19y 19 19 4 = y Check 76 = 19y 76 = 19(4) ? Substitute 4 for y. 76 = 76 ? 4 is a solution.

12
Homework Page 58 #8-18 Even Only

13
Lesson Quiz: Part I Solve the equation. Check your answer. 1. 12 = 4x 2. 18z = 90 3. 12 = = 12y 5. x = 3; 12 = 4 3 z = 5; 18 5 = 90 x 4 x = 48; 12 = x 4 y = 70; 840 = 12 70 h 22 h = 198; = 9 198 22 = 9

Similar presentations

© 2022 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google