7th Grade Math

EP12 Extra Practice

Extra Practice

Multi-Part Lesson 4-3: Multi-Step Equations

PARTS A B PAGES 228–234

Solve each equation. Check your solution.

1. 3 x + 6 = 6 2. 2 r - 7 = - 1 3. - 10 + 2 d = 8


2. 2 b + 4 = - 8 5. 5 w - 12 = 3 6. 5 t - 4 = 6


3. 2 q - 6 = 4 8. 2 g - 3 = - 9 9. 15 = 6 y + 3


4. 3 s - 4 = 8 11. 18 - 7 f = 4 12. 13 + 3 p = 7


5. 7.5r + 2 = - 28 14. 4.2 + 7 z = 2.8 15. - 9 m - 9 = 9


6. 32 + 0.2c = 1 17. 5 t - 14 = - 14 18. -0.25x + 0.5 = 4


7. 5 w - 4 = 8 20. 4 d - 3 = 9 21. 2 g - 16 = - 9


8. 4 k + 13 = 20 23. 7 = 5 - 2 x 24. 8 z + 15 = - 1


9. 92 - 16 b = 12 26. 14 e + 14 = 28 27. 1.1j + 2 = 7.5

PARTS C D PAGES 235–239

Express each equation as another equivalent equation. Justify your answer.

1. x - 6 = - 3 x + 10 2. 2 x + 7 = x - 6 3. 5 x - 3 = 18 + 2 x

Solve each equation. Check your solution.

4. 11 x - 7 = 5 - x 5. 2 - 8 x = 10 x + 20 6. 17 - 3 x = 2 + 2 x


5. 4 x - 5 = 2 x + 11 8. 2 x + 4 = 25 x - 6 9. 7 - 4 x = x + 12


6. 
   
   
   
   • 1 + 8 x = 4 x + 5 11. - 6 - 5 x = 12 - x 12. 6 x + 11 = 4 x + 10
   
   
   
   


7. 3 + _ 6 x = - 2 + x 14. - 9 x + 7 = 25 - 3 x 15. - 42 + 3 x = 12 - 3 x


8. 5 x + 3.6 = 3 x - 1.2 17. 0.6x + 15 = -1.4x + 12 18. 2 x - 8 = 0.75x - 5

Multi-Part Lesson 4-4: Inequalities

PART A B PAGES 242–248

Solve each inequality. Graph the solution set on a number line.

1. y + 3 > 7 2. c - 9 < 5 3. x + 4 ≥ 9


2. y - 3 < 15 5. t - 13 ≥ 5 6. x + 3 < 10


3. y - 6 ≥ 2 8. x - 3 ≥ - 6 9. a + 3 ≤ 5


4. c - 2 ≤ 11 11. a + 15 ≥ 6 12. y + 3 ≥ 18


5. y + 16 ≥ - 22 14. x - 3 ≥ 17 15. y - 6 > - 17


6. y - 11 < 7 17. a + 5 ≥ 21 18. c + 3 > - 16


7. x - 12 ≥ 12 20. x + 5 ≥ 5 21. y - 6 > 31

EP2_EP36_ExtPract_M1_895130.indd EP12 1/6/10 11:46 AM