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MathsAges 7-9

Missing-value equations

Find the missing value that makes an equation true, then check by substitution. Review suitability for your learners before teaching.

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Age band:Ages 7-9Ages 10-12

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Worksheet StudioPractice pack · Ages 7-9

Missing-value equations

Take your time. Show your thinking.

  1. 1. 3 × x + 5 = 14. Find x.

    LHS=RHS
    3 · 5 · 14 · Missing-value equations

  2. 2. 7 × x + 3 = 52. Find x.

    LHS=RHS
    7 · 3 · 52 · Missing-value equations

  3. 3. 12 × x + 8 = 152. Find x.

    LHS=RHS
    12 · 8 · 152 · Missing-value equations

  4. 4. 2 × x + 8 = 12. Find x.

    LHS=RHS
    2 · 8 · 12 · Missing-value equations

  5. 5. 4 × x + 7 = 23. Find x.

    LHS=RHS
    4 · 7 · 23 · Missing-value equations

  6. 6. 4 × x + 11 = 27. Find x.

    LHS=RHS
    4 · 11 · 27 · Missing-value equations

  7. 7. 11 × x + 10 = 131. Find x.

    LHS=RHS
    11 · 10 · 131 · Missing-value equations

  8. 8. 11 × x + 2 = 123. Find x.

    LHS=RHS
    11 · 2 · 123 · Missing-value equations

  9. 9. 7 × x + 11 = 60. Find x.

    LHS=RHS
    7 · 11 · 60 · Missing-value equations

  10. 10. 12 × x + 10 = 154. Find x.

    LHS=RHS
    12 · 10 · 154 · Missing-value equations

  11. 11. 3 × x + 4 = 13. Find x.

    LHS=RHS
    3 · 4 · 13 · Missing-value equations

  12. 12. 10 × x + 9 = 109. Find x.

    LHS=RHS
    10 · 9 · 109 · Missing-value equations
12 questions · Seed 52 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9

Missing-value equations

Answers and reasoning. Review before teaching.

  1. 1. 3 × x + 5 = 14. Find x.

    3

    Subtract 5, then divide by 3: x = 3.

  2. 2. 7 × x + 3 = 52. Find x.

    7

    Subtract 3, then divide by 7: x = 7.

  3. 3. 12 × x + 8 = 152. Find x.

    12

    Subtract 8, then divide by 12: x = 12.

  4. 4. 2 × x + 8 = 12. Find x.

    2

    Subtract 8, then divide by 2: x = 2.

  5. 5. 4 × x + 7 = 23. Find x.

    4

    Subtract 7, then divide by 4: x = 4.

  6. 6. 4 × x + 11 = 27. Find x.

    4

    Subtract 11, then divide by 4: x = 4.

  7. 7. 11 × x + 10 = 131. Find x.

    11

    Subtract 10, then divide by 11: x = 11.

  8. 8. 11 × x + 2 = 123. Find x.

    11

    Subtract 2, then divide by 11: x = 11.

  9. 9. 7 × x + 11 = 60. Find x.

    7

    Subtract 11, then divide by 7: x = 7.

  10. 10. 12 × x + 10 = 154. Find x.

    12

    Subtract 10, then divide by 12: x = 12.

  11. 11. 3 × x + 4 = 13. Find x.

    3

    Subtract 4, then divide by 3: x = 3.

  12. 12. 10 × x + 9 = 109. Find x.

    10

    Subtract 9, then divide by 10: x = 10.

12 questions · Seed 52 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Missing-value equations

Take your time. Show your thinking.

  1. 1. 3 × x + 5 = 14. Find x.

    LHS=RHS
    3 · 5 · 14 · Missing-value equations

  2. 2. 7 × x + 3 = 52. Find x.

    LHS=RHS
    7 · 3 · 52 · Missing-value equations

  3. 3. 12 × x + 8 = 152. Find x.

    LHS=RHS
    12 · 8 · 152 · Missing-value equations

  4. 4. 2 × x + 8 = 12. Find x.

    LHS=RHS
    2 · 8 · 12 · Missing-value equations

  5. 5. 4 × x + 7 = 23. Find x.

    LHS=RHS
    4 · 7 · 23 · Missing-value equations

  6. 6. 4 × x + 11 = 27. Find x.

    LHS=RHS
    4 · 11 · 27 · Missing-value equations

  7. 7. 11 × x + 10 = 131. Find x.

    LHS=RHS
    11 · 10 · 131 · Missing-value equations

  8. 8. 11 × x + 2 = 123. Find x.

    LHS=RHS
    11 · 2 · 123 · Missing-value equations

  9. 9. 7 × x + 11 = 60. Find x.

    LHS=RHS
    7 · 11 · 60 · Missing-value equations

  10. 10. 12 × x + 10 = 154. Find x.

    LHS=RHS
    12 · 10 · 154 · Missing-value equations

  11. 11. 3 × x + 4 = 13. Find x.

    LHS=RHS
    3 · 4 · 13 · Missing-value equations

  12. 12. 10 × x + 9 = 109. Find x.

    LHS=RHS
    10 · 9 · 109 · Missing-value equations
12 questions · Seed 52 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Missing-value equations

Answers and reasoning. Review before teaching.

  1. 1. 3 × x + 5 = 14. Find x.

    3

    Subtract 5, then divide by 3: x = 3.

  2. 2. 7 × x + 3 = 52. Find x.

    7

    Subtract 3, then divide by 7: x = 7.

  3. 3. 12 × x + 8 = 152. Find x.

    12

    Subtract 8, then divide by 12: x = 12.

  4. 4. 2 × x + 8 = 12. Find x.

    2

    Subtract 8, then divide by 2: x = 2.

  5. 5. 4 × x + 7 = 23. Find x.

    4

    Subtract 7, then divide by 4: x = 4.

  6. 6. 4 × x + 11 = 27. Find x.

    4

    Subtract 11, then divide by 4: x = 4.

  7. 7. 11 × x + 10 = 131. Find x.

    11

    Subtract 10, then divide by 11: x = 11.

  8. 8. 11 × x + 2 = 123. Find x.

    11

    Subtract 2, then divide by 11: x = 11.

  9. 9. 7 × x + 11 = 60. Find x.

    7

    Subtract 11, then divide by 7: x = 7.

  10. 10. 12 × x + 10 = 154. Find x.

    12

    Subtract 10, then divide by 12: x = 12.

  11. 11. 3 × x + 4 = 13. Find x.

    3

    Subtract 4, then divide by 3: x = 3.

  12. 12. 10 × x + 9 = 109. Find x.

    10

    Subtract 9, then divide by 10: x = 10.

12 questions · Seed 52 · Age guidance, not curriculum certification