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Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 428 · 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.The sum of three consecutive whole numbers is 81. What is the largest of them?
  2. 2.Solve: 4t + 3 = 3t + 11. What is t?
  3. 3.A father is 13 years older than his son. In 1 year, the father will be twice as old as his son. How old is the son now?
  4. 4.The length of a rectangle is 14 cm more than its width. Its perimeter is 92 cm. What is its width (in cm)?
  5. 5.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?
  6. 6.Solve: 3p + 9 = p + 15. What is p?
  7. 7.Solve: 3(y − 1) = 2y + 8. What is y?
  8. 8.The sum of four consecutive whole numbers is 210. What is the smallest of them?
  9. 9.The length of a rectangle is 1 cm more than its width. Its perimeter is 14 cm. What is its width (in cm)?
  10. 10.The sum of four consecutive whole numbers is 194. What is the largest of them?
  11. 11.Solve: m/2 + m/5 = 42. What is m?
  12. 12.Solve: p/4 + p/6 = 5. What is p?
  13. 13.A father is 18 years older than his son. In 2 years, the father will be three times as old as his son. How old is the son now?
  14. 14.Solve: 6(y − 1) = 3y + 24. What is y?
  15. 15.A father is 10 years older than his son. In 2 years, the father will be three times as old as his son. How old is the son now?
  16. 16.The sum of two consecutive whole numbers is 85. What is the smallest of them?
  17. 17.Solve: m/4 + m/3 = 49. What is m?
  18. 18.Solve: 3t + 18 = 2t + 21. What is t?
  19. 19.Solve: 5(n − 1) = n + 47. What is n?
  20. 20.The sum of three consecutive whole numbers is 159. What is the smallest of them?
  21. 21.Solve: 7y + 11 = 2y + 36. What is y?
  22. 22.Solve: 4(p − 4) = p + 17. What is p?
  23. 23.The length of a rectangle is 1 cm more than its width. Its perimeter is 18 cm. What is its width (in cm)?
  24. 24.Solve: 6(x − 1) = 2x + 42. What is x?
  25. 25.The length of a rectangle is 8 cm more than its width. Its perimeter is 96 cm. What is its width (in cm)?
  26. 26.A father is 18 years older than his son. In 7 years, the father will be twice as old as his son. How old is the son now?
  27. 27.Solve: 7t + 13 = 2t + 48. What is t?
  28. 28.Solve: 6p + 4 = 2p + 36. What is p?
  29. 29.Solve: 9p + 4 = 2p + 18. What is p?
  30. 30.Solve: 4x + 9 = 3x + 18. What is x?
  31. 31.Solve: n/2 + n/4 = 18. What is n?
  32. 32.Solve: 3(y − 4) = 2y + 10. What is y?
  33. 33.Solve: t/6 + t/2 = 8. What is t?
  34. 34.Solve: 6(y − 5) = 3y + 9. What is y?
  35. 35.The sum of four consecutive whole numbers is 70. What is the smallest of them?
  36. 36.A father is 5 years older than his son. In 2 years, the father will be twice as old as his son. How old is the son now?
  37. 37.Solve: 5(n − 3) = n + 13. What is n?
  38. 38.Solve: 3(m − 2) = m + 10. What is m?
  39. 39.Solve: p/5 + p/4 = 63. What is p?
  40. 40.A father is 54 years older than his son. In 8 years, the father will be four times as old as his son. How old is the son now?

Answer key

  1. 28
  2. 8
  3. 12
  4. 16
  5. 4
  6. 3
  7. 11
  8. 51
  9. 3
  10. 50
  11. 60
  12. 12
  13. 7
  14. 10
  15. 3
  16. 42
  17. 84
  18. 3
  19. 13
  20. 52
  21. 5
  22. 11
  23. 4
  24. 12
  25. 20
  26. 11
  27. 7
  28. 8
  29. 2
  30. 9
  31. 24
  32. 22
  33. 12
  34. 13
  35. 16
  36. 3
  37. 7
  38. 8
  39. 140
  40. 10

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