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Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 7 · 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 four consecutive whole numbers is 238. What is the smallest of them?
  2. 2.Solve: 6t + 2 = 5t + 17. What is t?
  3. 3.The length of a rectangle is 10 cm more than its width. Its perimeter is 92 cm. What is its width (in cm)?
  4. 4.Solve: 5(t − 1) = 4t + 5. What is t?
  5. 5.The length of a rectangle is 7 cm more than its width. Its perimeter is 82 cm. What is its width (in cm)?
  6. 6.The sum of three consecutive whole numbers is 72. What is the largest of them?
  7. 7.Solve: 5x + 12 = 4x + 18. What is x?
  8. 8.Solve: 3(y − 3) = 2y + 9. What is y?
  9. 9.Solve: 4p + 18 = 2p + 42. What is p?
  10. 10.A father is 24 years older than his son. In 2 years, the father will be four times as old as his son. How old is the son now?
  11. 11.Solve: 7t + 4 = 3t + 12. What is t?
  12. 12.The sum of two consecutive whole numbers is 79. What is the largest of them?
  13. 13.Solve: 4p + 8 = 2p + 12. What is p?
  14. 14.Solve: 6y + 17 = y + 32. What is y?
  15. 15.The length of a rectangle is 6 cm more than its width. Its perimeter is 72 cm. What is its width (in cm)?
  16. 16.Solve: 7n + 18 = 5n + 42. What is n?
  17. 17.Solve: 4(t − 4) = 3t + 2. What is t?
  18. 18.The length of a rectangle is 1 cm more than its width. Its perimeter is 30 cm. What is its width (in cm)?
  19. 19.Solve: 4(p − 1) = 2p + 24. What is p?
  20. 20.Solve: p/5 + p/3 = 8. What is p?
  21. 21.The length of a rectangle is 11 cm more than its width. Its perimeter is 130 cm. What is its width (in cm)?
  22. 22.A father is 5 years older than his son. In 1 year, the father will be twice as old as his son. How old is the son now?
  23. 23.Solve: n/2 + n/6 = 28. What is n?
  24. 24.Solve: 6(y − 4) = 4y + 16. What is y?
  25. 25.The length of a rectangle is 3 cm more than its width. Its perimeter is 70 cm. What is its width (in cm)?
  26. 26.The sum of three consecutive whole numbers is 147. What is the largest of them?
  27. 27.Solve: t/4 + t/6 = 15. What is t?
  28. 28.Solve: m/4 + m/2 = 15. What is m?
  29. 29.The length of a rectangle is 8 cm more than its width. Its perimeter is 28 cm. What is its width (in cm)?
  30. 30.Solve: 4x + 18 = x + 54. What is x?
  31. 31.Solve: y/2 + y/5 = 28. What is y?
  32. 32.The sum of four consecutive whole numbers is 26. What is the smallest of them?
  33. 33.The sum of two consecutive whole numbers is 103. What is the smallest of them?
  34. 34.The sum of four consecutive whole numbers is 174. What is the smallest of them?
  35. 35.Solve: 3n + 4 = n + 26. What is n?
  36. 36.The sum of three consecutive whole numbers is 84. What is the largest of them?
  37. 37.Solve: 8m + 15 = 2m + 87. What is m?
  38. 38.The length of a rectangle is 5 cm more than its width. Its perimeter is 78 cm. What is its width (in cm)?
  39. 39.The sum of two consecutive whole numbers is 109. What is the largest of them?
  40. 40.Solve: 4(m − 4) = 2m + 2. What is m?

Answer key

  1. 58
  2. 15
  3. 18
  4. 10
  5. 17
  6. 25
  7. 6
  8. 18
  9. 12
  10. 6
  11. 2
  12. 40
  13. 2
  14. 3
  15. 15
  16. 12
  17. 18
  18. 7
  19. 14
  20. 15
  21. 27
  22. 4
  23. 42
  24. 20
  25. 16
  26. 50
  27. 36
  28. 20
  29. 3
  30. 12
  31. 40
  32. 5
  33. 51
  34. 42
  35. 11
  36. 29
  37. 12
  38. 17
  39. 55
  40. 9

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