Download presentation

Presentation is loading. Please wait.

Published byNoah Eaton Modified over 4 years ago

1
1-8 Solving Equations by Adding or Subtracting Warm-up: Fluency Quiz. Sit with paper blank side up. Homework: Page 41 #4-8 even, #12-16 even, 20-32 even, Page 45 #2-16 even, #22-36 even, #44-56 even

2
1-8 Solving Equations by Adding or Subtracting Solve. Example 1- I Do Use the Subtraction Property of Equality: Subtract 10 from both sides. 10 + n = 18 –10 0 + n = 8 n = 8 Identity Property of Zero: 0 + n = n. Check 10 + n = 18 10 + 8 = 18 18 = 18 Substitute 8 for n.

3
1-8 Solving Equations by Adding or Subtracting Solve. Example 2- You Do Use the Addition Property of Equality: Add 8 to both sides. p – 8 = 9 + 8 p + 0 = 17 p = 17 Identity Property of Zero: p + 0 = p. Check p – 8 = 9 17 – 8 = 9 9 = 9 Substitute 17 for p.

4
1-8 Solving Equations by Adding or Subtracting Solve. Example 3 – I Do Use the Addition Property of Equality: Add 11 to both sides. 22 = y – 11 + 11 33 = y + 0 33 = y Identity Property of Zero: y + 0 = y. Check 22 = y – 11 22 = 33 – 11 22 = 22 Substitute 33 for y.

5
1-8 Solving Equations by Adding or Subtracting Solve. Example 4- You Do Use the Subtraction Property of Equality: Subtract 15 from both sides. 15 + n = 29 –15 0 + n = 14 n = 14 Identity Property of Zero: 0 + n = n. Check 15 + n = 29 10 + 14 = 29 29 = 29 Substitute 14 for n.

6
1-8 Solving Equations by Adding or Subtracting Solve 6x = 48. Example 5- I Do 6x = 48 1x = 8 Use the Division Property of Equality: Divide both sides by 6. Check 6x = 48 66 x = 8 6x = 48 6(8) = 4848 = 48 Substitute 8 for x. 1 x = x

7
1-8 Solving Equations by Adding or Subtracting Solve –9y = 45. Example 6- You Do –9y = 45 1y = –5 Use the Division Property of Equality: Divide both sides by –9. Check –9y = 45 –9 y = –5 –9y = 45 –9(–5) = 45 45 = 45 Substitute –5 for y. 1 y = y

8
1-8 Solving Equations by Adding or Subtracting Solve = 5. Example 7- I Do b –4 b = 5 –4 Use the Multiplication Property of Equality: Multiply both sides by –4. b = –20 Check b –4 = 5 Substitute –20 for b. –20 –4 = 5 5 = 5

9
1-8 Solving Equations by Adding or Subtracting Solve = 5. Example 8- You Do c –3 c = 5 –3 Use the Multiplication Property of Equality: Multiply both sides by –3. c = –15 Check c –3 = 5 Substitute –15 for c. –15 –3 = 5 5 = 5

Similar presentations

© 2020 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