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Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 83 · 40 sums
TalentJR

The method (Letters one side, numbers the other): Open brackets: a(x − b) = ax − ab. Fractions: multiply both sides by the LCM of the denominators — x/3 + x/4 = 14 → 4x + 3x = 168. Move letter terms to one side and numbers to the other (change the sign when a term crosses =), then divide. Word problems: consecutive numbers are n, n + 1, n + 2 …; ages in y years are age + y.

NameDateTime takenScore ___ / 40
  1. 1.Solve: 9m + 11 = 7m + 21. What is m?
  2. 2.Solve: p/6 + p/2 = 32. What is p?
  3. 3.The sum of four consecutive whole numbers is 230. What is the smallest of them?
  4. 4.The sum of three consecutive whole numbers is 48. What is the largest of them?
  5. 5.A father is 7 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
  6. 6.The sum of two consecutive whole numbers is 53. What is the smallest of them?
  7. 7.Solve: 4(p − 2) = 3p + 2. What is p?
  8. 8.Solve: 5m + 17 = m + 53. What is m?
  9. 9.Solve: t/4 + t/6 = 15. What is t?
  10. 10.A father is 12 years older than his son. In 8 years, the father will be twice as old as his son. How old is the son now?
  11. 11.Solve: 4(p − 4) = 3p + 8. What is p?
  12. 12.Solve: x/5 + x/4 = 72. What is x?
  13. 13.Solve: 4(y − 4) = y + 14. What is y?
  14. 14.The length of a rectangle is 5 cm more than its width. Its perimeter is 122 cm. What is its width (in cm)?
  15. 15.Solve: 6x + 20 = 2x + 48. What is x?
  16. 16.Solve: 6(p − 2) = 5p + 7. What is p?
  17. 17.Solve: 3m + 13 = m + 33. What is m?
  18. 18.Solve: y/4 + y/5 = 36. What is y?
  19. 19.Solve: 6(x − 3) = x + 7. What is x?
  20. 20.A father is 5 years older than his son. In 3 years, the father will be twice as old as his son. How old is the son now?
  21. 21.Solve: 5t + 15 = t + 23. What is t?
  22. 22.The sum of two consecutive whole numbers is 17. What is the largest of them?
  23. 23.The sum of two consecutive whole numbers is 39. What is the smallest of them?
  24. 24.Solve: 9m + 9 = m + 41. What is m?
  25. 25.Solve: y/3 + y/2 = 5. What is y?
  26. 26.Solve: 5(y − 4) = 2y + 22. What is y?
  27. 27.The length of a rectangle is 2 cm more than its width. Its perimeter is 116 cm. What is its width (in cm)?
  28. 28.A father is 24 years older than his son. In 4 years, the father will be three times as old as his son. How old is the son now?
  29. 29.Solve: 3y + 16 = y + 42. What is y?
  30. 30.The sum of four consecutive whole numbers is 178. What is the largest of them?
  31. 31.A father is 45 years older than his son. In 5 years, the father will be four times as old as his son. How old is the son now?
  32. 32.The sum of four consecutive whole numbers is 174. What is the largest of them?
  33. 33.Solve: y/2 + y/5 = 14. What is y?
  34. 34.Solve: 6(m − 3) = 2m + 26. What is m?
  35. 35.The sum of two consecutive whole numbers is 105. What is the smallest of them?
  36. 36.Solve: n/4 + n/5 = 54. What is n?
  37. 37.Solve: 6y + 3 = 3y + 9. What is y?
  38. 38.A father is 21 years older than his son. In 1 year, the father will be four times as old as his son. How old is the son now?
  39. 39.Solve: 9y + 6 = 5y + 42. What is y?
  40. 40.A father is 8 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?

Answer key

  1. 5
  2. 48
  3. 56
  4. 17
  5. 2
  6. 26
  7. 10
  8. 9
  9. 36
  10. 4
  11. 24
  12. 160
  13. 10
  14. 28
  15. 7
  16. 19
  17. 10
  18. 80
  19. 5
  20. 2
  21. 2
  22. 9
  23. 19
  24. 4
  25. 6
  26. 14
  27. 28
  28. 8
  29. 13
  30. 46
  31. 10
  32. 45
  33. 20
  34. 11
  35. 52
  36. 120
  37. 2
  38. 6
  39. 9
  40. 3

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