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Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 716 · 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: 5y + 2 = y + 14. What is y?
  2. 2.A father is 30 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?
  3. 3.A father is 14 years older than his son. In 3 years, the father will be twice as old as his son. How old is the son now?
  4. 4.Solve: 9x + 6 = 7x + 8. What is x?
  5. 5.Solve: 4(t − 4) = 3t + 8. What is t?
  6. 6.The length of a rectangle is 5 cm more than its width. Its perimeter is 46 cm. What is its width (in cm)?
  7. 7.The length of a rectangle is 10 cm more than its width. Its perimeter is 92 cm. What is its width (in cm)?
  8. 8.A father is 24 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?
  9. 9.Solve: 5(x − 1) = x + 3. What is x?
  10. 10.The length of a rectangle is 7 cm more than its width. Its perimeter is 106 cm. What is its width (in cm)?
  11. 11.Solve: 6m + 2 = 4m + 24. What is m?
  12. 12.The sum of two consecutive whole numbers is 33. What is the smallest of them?
  13. 13.Solve: 4t + 1 = 2t + 3. What is t?
  14. 14.Solve: 3(p − 3) = p + 9. What is p?
  15. 15.The length of a rectangle is 8 cm more than its width. Its perimeter is 96 cm. What is its width (in cm)?
  16. 16.Solve: 4m + 7 = m + 46. What is m?
  17. 17.The length of a rectangle is 8 cm more than its width. Its perimeter is 124 cm. What is its width (in cm)?
  18. 18.The sum of three consecutive whole numbers is 132. What is the smallest of them?
  19. 19.The sum of four consecutive whole numbers is 202. What is the smallest of them?
  20. 20.Solve: 4n + 12 = n + 36. What is n?
  21. 21.The length of a rectangle is 3 cm more than its width. Its perimeter is 18 cm. What is its width (in cm)?
  22. 22.A father is 18 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?
  23. 23.The sum of two consecutive whole numbers is 37. What is the largest of them?
  24. 24.Solve: y/4 + y/2 = 6. What is y?
  25. 25.Solve: x/5 + x/2 = 35. What is x?
  26. 26.A father is 11 years older than his son. In 1 year, the father will be twice as old as his son. How old is the son now?
  27. 27.A father is 15 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
  28. 28.The sum of two consecutive whole numbers is 105. What is the largest of them?
  29. 29.The length of a rectangle is 13 cm more than its width. Its perimeter is 74 cm. What is its width (in cm)?
  30. 30.Solve: 6(n − 5) = 4n + 6. What is n?
  31. 31.A father is 7 years older than his son. In 3 years, the father will be twice as old as his son. How old is the son now?
  32. 32.A father is 9 years older than his son. In 2 years, the father will be twice as old as his son. How old is the son now?
  33. 33.The sum of three consecutive whole numbers is 174. What is the largest of them?
  34. 34.A father is 16 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
  35. 35.A father is 14 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?
  36. 36.Solve: x/2 + x/3 = 35. What is x?
  37. 37.The sum of four consecutive whole numbers is 170. What is the largest of them?
  38. 38.A father is 51 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?
  39. 39.The sum of four consecutive whole numbers is 170. What is the smallest of them?
  40. 40.The length of a rectangle is 5 cm more than its width. Its perimeter is 30 cm. What is its width (in cm)?

Answer key

  1. 3
  2. 6
  3. 11
  4. 1
  5. 24
  6. 9
  7. 18
  8. 4
  9. 2
  10. 23
  11. 11
  12. 16
  13. 1
  14. 9
  15. 20
  16. 13
  17. 27
  18. 43
  19. 49
  20. 8
  21. 3
  22. 5
  23. 19
  24. 8
  25. 50
  26. 10
  27. 10
  28. 53
  29. 12
  30. 18
  31. 4
  32. 7
  33. 59
  34. 11
  35. 5
  36. 42
  37. 44
  38. 12
  39. 41
  40. 5

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