1 / 23

Bellwork 10/12

Bellwork 10/12. Solve and Check: (Show your work) 1.) (x - 3)/4 = 6 2.) x/3 + 4 = 10 3.) 2a - 3 = 5a - 9 Simplify: 4.) 2(3 - x) 5.) 3(6 - 2y). Bellwork 10/12. Solution. Check. Solve and Check: 1.) (x - 3)/4 = 6 2.) x/3 + 4 = 10 3.) 2a - 3 = 5a - 9 4.) 2(3 - x) 5.) 3(6 - 2y).

betty_james
Download Presentation

Bellwork 10/12

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bellwork 10/12 • Solve and Check:(Show your work) • 1.) (x - 3)/4 = 6 • 2.) x/3 + 4 = 10 • 3.) 2a - 3 = 5a - 9 • Simplify: • 4.) 2(3 - x) • 5.) 3(6 - 2y)

  2. Bellwork 10/12 Solution Check • Solve and Check: • 1.) (x - 3)/4 = 6 • 2.) x/3 + 4 = 10 • 3.) 2a - 3 = 5a - 9 • 4.) 2(3 - x) • 5.) 3(6 - 2y) x = 27 6=6 x = 18 10=10 2 = a 1 =1 Simplify 6 - 2x 18 - 6y

  3. Today’s Objective • To be able to solve equations with fractions and decimals.

  4. Multiply by 100 Why 100 ? Example #1 • 3.57x - 37.40 = .23x + 8.32 • (100)3.57x-37.40=.23x+8.32(100) • 357x - 3740 = 23x + 832 • 357x -23x - 3740 = 23x -23x + 832 • 334x - 3740 = 832 • 334x - 3740 + 3740 = 832 + 3740 • 334x = 4572

  5. Example #1 • 334x = 4572 • 334x/334 = 4572/334 • x  13.69

  6. Remove the decimal points Now you try this • 4.5 - 7.2x = 3.4x - 49.5 • (10)4.5 - 7.2x = 3.4x - 49.5(10) 45 - 72x = 34x - 495

  7. Now you try this • 4.5 - 7.2x = 3.4x - 49.5 • (10)4.5 - 7.2x = 3.4x - 49.5(10) • 45 - 72x = 34x - 495 • 45 - 72x +72x = 34x +72x-495 • 45 = 106x - 495 • 45 + 495 = 106x - 495 + 495 • 540 = 106x

  8. Now you try this • 540 = 106x • 540/106 = 106x/106 • 5.1  x

  9. Equations with Fractions and special fraction problems

  10. Example #1 • x/3 - 9 = 21 • x/3 - 9 + 9 = 21 + 9 • x/3 = 30 • (3)x/3 = 30(3) • x = 90

  11. Check #1 • x/3 - 9 = 21 • 90/3 - 9 = 21 • 30 - 9 = 21 • 21 = 21 True

  12. Now You try this one (solve and check) • a/5 - 6 = 10 • a/5 - 6 + 6 = 10 + 6 • a/5 = 16 • (5)a/5 = 16(5) • a = 80

  13. Check • a/5 - 6 = 10 • 80/5 - 6 = 10 • 16 - 6 = 10 • 10 = 10 True

  14. Example #2 • (x - 9)/3 = 21 • (3)(x - 9)/3 = 21(3) • x - 9 = 63 • x - 9 + 9 = 63 + 9 • x = 72

  15. Check #2 • (x - 9)/3 = 21 • (72 - 9)/3 = 21 • 63/3 = 21 • 21 = 21 True

  16. Now You try this one (solve and check) • (x - 2)/3 = 5 • (3)(x - 2)/3 = 5(3) • x - 2 = 15 • x - 2 + 2 = 15 + 2 • x = 17

  17. Check • (x - 2)/3 = 5 • (17 - 2)/3 = 5 • 15/3 = 5 • 5 = 5 True

  18. Be READY to tell me the Mistake Below: • 2(6 - 2x) = 4 • 12 - 2x = 4 • 12 -12 - 2x = 4 - 12 • - 2x = -8 • -2x/-2 = -8/-2 x = 4

  19. The corrected version • 2(6 - 2x) = 4 • 12 - 4x = 4 • 12 -12 - 4x = 4 - 12 • - 4x = -8 • -4x/-4 = -8/-4 x = 2

  20. Be READY to tell me the Mistake Below: • 2(6 - 2x) = 4 • 12 - 4x = 4 • 12 - 12 - 4x = 4 - 12 • 4x = -8 • 4x/4 = -8/4 x = -2

  21. The corrected version • 2(6 - 2x) = 4 • 12 - 4x = 4 • 12 -12 - 4x = 4 - 12 • - 4x = -8 • -4x/-4 = -8/-4 x = 2

  22. Solve the following • 1.) 2(3-x) = 4 • 2.) 2(6 - 2x) = 4 • 3.) 1/2(4 - 6a) = 6 x = 1 x = 2 a = -4/3

  23. Classwork • Do worksheet 3-5 (1-24) • Homework • Page 151 (5-28)

More Related