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Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 163 · 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 two consecutive whole numbers is 121. What is the smallest of them?
  2. 2.Solve: 4(y − 1) = y + 8. What is y?
  3. 3.The length of a rectangle is 11 cm more than its width. Its perimeter is 106 cm. What is its width (in cm)?
  4. 4.Solve: 6(t − 3) = 3t + 6. What is t?
  5. 5.Solve: 5(t − 5) = t + 11. What is t?
  6. 6.The length of a rectangle is 14 cm more than its width. Its perimeter is 108 cm. What is its width (in cm)?
  7. 7.Solve: 5(y − 2) = y + 18. What is y?
  8. 8.The sum of three consecutive whole numbers is 69. What is the smallest of them?
  9. 9.The length of a rectangle is 15 cm more than its width. Its perimeter is 138 cm. What is its width (in cm)?
  10. 10.The length of a rectangle is 6 cm more than its width. Its perimeter is 36 cm. What is its width (in cm)?
  11. 11.Solve: 4(t − 2) = 2t + 6. What is t?
  12. 12.Solve: m/4 + m/6 = 30. What is m?
  13. 13.Solve: 3(p − 5) = 2p + 1. What is p?
  14. 14.Solve: 4(n − 1) = 3n + 2. What is n?
  15. 15.Solve: 3(n − 1) = 2n + 1. What is n?
  16. 16.The length of a rectangle is 12 cm more than its width. Its perimeter is 112 cm. What is its width (in cm)?
  17. 17.Solve: 5(y − 4) = 4y + 4. What is y?
  18. 18.The sum of four consecutive whole numbers is 106. What is the largest of them?
  19. 19.Solve: 5t + 3 = 3t + 27. What is t?
  20. 20.Solve: 3(n − 1) = n + 17. What is n?
  21. 21.The length of a rectangle is 12 cm more than its width. Its perimeter is 80 cm. What is its width (in cm)?
  22. 22.The length of a rectangle is 15 cm more than its width. Its perimeter is 90 cm. What is its width (in cm)?
  23. 23.A father is 39 years older than his son. In 3 years, the father will be four times as old as his son. How old is the son now?
  24. 24.Solve: 3(x − 4) = x + 6. What is x?
  25. 25.Solve: 3(p − 5) = 2p + 12. What is p?
  26. 26.Solve: 6(p − 3) = p + 57. What is p?
  27. 27.The length of a rectangle is 6 cm more than its width. Its perimeter is 56 cm. What is its width (in cm)?
  28. 28.Solve: 5(n − 3) = 2n + 24. What is n?
  29. 29.Solve: 8t + 8 = 4t + 24. What is t?
  30. 30.Solve: 8y + 14 = 2y + 32. What is y?
  31. 31.Solve: 5(y − 1) = 3y + 3. What is y?
  32. 32.Solve: 6(x − 3) = 3x + 9. What is x?
  33. 33.The length of a rectangle is 13 cm more than its width. Its perimeter is 118 cm. What is its width (in cm)?
  34. 34.The length of a rectangle is 14 cm more than its width. Its perimeter is 84 cm. What is its width (in cm)?
  35. 35.Solve: 4p + 15 = 2p + 21. What is p?
  36. 36.A father is 21 years older than his son. In 4 years, the father will be four times as old as his son. How old is the son now?
  37. 37.The length of a rectangle is 10 cm more than its width. Its perimeter is 112 cm. What is its width (in cm)?
  38. 38.The sum of four consecutive whole numbers is 230. What is the smallest of them?
  39. 39.Solve: 6(m − 1) = 2m + 6. What is m?
  40. 40.The sum of four consecutive whole numbers is 162. What is the smallest of them?

Answer key

  1. 60
  2. 4
  3. 21
  4. 8
  5. 9
  6. 20
  7. 7
  8. 22
  9. 27
  10. 6
  11. 7
  12. 72
  13. 16
  14. 6
  15. 4
  16. 22
  17. 24
  18. 28
  19. 12
  20. 10
  21. 14
  22. 15
  23. 10
  24. 9
  25. 27
  26. 15
  27. 11
  28. 13
  29. 4
  30. 3
  31. 4
  32. 9
  33. 23
  34. 14
  35. 3
  36. 3
  37. 23
  38. 56
  39. 3
  40. 39

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