Math 9 · Unit 4: Equations and inequalities · Cambridge Lower Secondary Maths Stage 9

Questions

1. 1. Copy and complete the workings to solve these equations. 2x − 6 = 10

   Fill the blanks with these.

   • 4
   • 16
   • 5
   • 8
   Check

2. 2. Copy and complete the workings to solve these equations. 4(3x + 2) = 32

   Fill the blanks with these.

   • 4
   • 2
   • 8
   • 12
   • 24
   Check

3. 3. Copy and complete the workings to solve these equations. y/2 − 3 = 1

   Fill the blanks with these.

   • −2
   • 4
   • 2
   • 8
   • 3
   Check

4. 4. Copy and complete the workings to solve these equations. 5y + 3 = 9 + 2y

   Fill the blanks with these.

   • 6
   • 3
   • 12
   • 9
   • 2
   Check

5. 5. Copy and complete the workings to solve these equations. 5 − 2x = 9

   Fill the blanks with these.

   • 2
   • -2
   • 5
   • 14
   • 4
   Check

6. 6. Copy and complete the workings to solve these equations. 6(3 − x) = 3x

   Fill the blanks with these.

   • 18
   • 24
   • 2
   • 9
   Check

7. 7. Copy and complete the workings to solve these equations. 3y/4 + 1 = 7

   Fill the blanks with these.

   • 6
   • 3
   • 24
   • 28
   • 1
   • 8
   Check

8. 8. Copy and complete the workings to solve these equations. 3(y + 5) = 2(20 − y)

   Fill the blanks with these.

   • 2
   • 20
   • 5
   • 10
   • 15
   • 25
   Check

9. 9. Copy and complete the workings to solve these equations. 30/x = 5

   Fill the blanks with these.

   • 25
   • 5
   • 150
   • 6
   Check

10. 10. Copy and complete the workings to solve these equations. 63/(y + 1) = 9

    Fill the blanks with these.

    • 7
    • 54
    • 6
    • 9
    • 8
    Check

11. 11. Solve 3g − 5 = 31.

    • g = 36
    • g = 8.7
    • g = 12
    • g = 26/3
    Check

12. 12. Solve −3g − 5 = 25.

    • g = 6.7
    • g = −10
    • g = 10
    • g = −6.7
    Check

13. 13. Solve 7 + 4p = 28 + p.

    • p = 7
    • p = 9
    • p = 3
    • p = 5
    Check

14. 14. Solve −5 + 3g = 16.

    • g = 21
    • g = 7
    • g = −7
    • g = 11/3
    Check

15. 15. Solve 15 = 40 − 5y.

    • y = 3
    • y = 11
    • y = 5
    • y = −5
    Check

16. 16. Solve 6(y − 7) = 30.

    • y = 37
    • y = 5
    • y = 12
    • y = 2
    Check

17. 17. Solve 0 = 17(15 + 5x).

    • x = −15
    • x = 0
    • x = −3
    • x = 3
    Check

18. 18. Solve 5(x + 5) + 3(x − 2) = 3.

    • x = −1
    • x = −2
    • x = 2
    • x = 3
    Check

19. 19. Here is an equation: 5(x + 3) = 10x − 20. Solve the equation by first multiplying out the brackets.

    • x = −7
    • x = 4.6
    • x = 7
    • x = 35
    Check

20. 20. Here is an equation: 5(x + 3) = 10x − 20. Solve the equation by first dividing by 5.

    • x = −7
    • x = 7
    • x = 3.5
    • x = 1
    Check