← Linear equations in one variable lesson New set →

Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 802 · 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 30. What is the smallest of them?
  2. 2.Solve: 5t + 19 = 2t + 37. What is t?
  3. 3.Solve: 3y + 18 = y + 38. What is y?
  4. 4.A father is 57 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?
  5. 5.Solve: 6(y − 3) = 2y + 26. What is y?
  6. 6.A father is 27 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?
  7. 7.Solve: 4x + 9 = x + 48. What is x?
  8. 8.Solve: n/2 + n/4 = 12. What is n?
  9. 9.The length of a rectangle is 4 cm more than its width. Its perimeter is 36 cm. What is its width (in cm)?
  10. 10.Solve: y/5 + y/6 = 44. What is y?
  11. 11.Solve: t/2 + t/5 = 35. What is t?
  12. 12.Solve: n/2 + n/5 = 56. What is n?
  13. 13.Solve: 5(x − 4) = x + 52. What is x?
  14. 14.The length of a rectangle is 13 cm more than its width. Its perimeter is 102 cm. What is its width (in cm)?
  15. 15.The sum of four consecutive whole numbers is 162. What is the smallest of them?
  16. 16.A father is 4 years older than his son. In 1 year, the father will be twice as old as his son. How old is the son now?
  17. 17.Solve: 3(x − 3) = 2x + 13. What is x?
  18. 18.A father is 10 years older than his son. In 2 years, the father will be twice as old as his son. How old is the son now?
  19. 19.The length of a rectangle is 3 cm more than its width. Its perimeter is 78 cm. What is its width (in cm)?
  20. 20.Solve: y/3 + y/2 = 35. What is y?
  21. 21.Solve: p/3 + p/2 = 40. What is p?
  22. 22.Solve: 5x + 8 = 4x + 18. What is x?
  23. 23.Solve: 7y + 3 = 3y + 35. What is y?
  24. 24.The sum of two consecutive whole numbers is 41. What is the smallest of them?
  25. 25.Solve: m/2 + m/6 = 16. What is m?
  26. 26.Solve: p/4 + p/2 = 9. What is p?
  27. 27.Solve: 4(x − 2) = x + 16. What is x?
  28. 28.Solve: 3(x − 2) = x + 2. What is x?
  29. 29.A father is 30 years older than his son. In 6 years, the father will be three times as old as his son. How old is the son now?
  30. 30.A father is 12 years older than his son. In 1 year, the father will be three times as old as his son. How old is the son now?
  31. 31.Solve: 7x + 18 = x + 78. What is x?
  32. 32.The sum of four consecutive whole numbers is 234. What is the largest of them?
  33. 33.A father is 9 years older than his son. In 1 year, the father will be twice as old as his son. How old is the son now?
  34. 34.Solve: p/5 + p/3 = 24. What is p?
  35. 35.A father is 36 years older than his son. In 7 years, the father will be four times as old as his son. How old is the son now?
  36. 36.Solve: 6x + 14 = 5x + 17. What is x?
  37. 37.Solve: 8n + 8 = 5n + 32. What is n?
  38. 38.The length of a rectangle is 11 cm more than its width. Its perimeter is 110 cm. What is its width (in cm)?
  39. 39.Solve: 3n + 3 = n + 29. What is n?
  40. 40.Solve: 7y + 5 = 2y + 30. What is y?

Answer key

  1. 6
  2. 6
  3. 10
  4. 11
  5. 11
  6. 8
  7. 13
  8. 16
  9. 7
  10. 120
  11. 50
  12. 80
  13. 18
  14. 19
  15. 39
  16. 3
  17. 22
  18. 8
  19. 18
  20. 42
  21. 48
  22. 10
  23. 8
  24. 20
  25. 24
  26. 12
  27. 8
  28. 4
  29. 9
  30. 5
  31. 10
  32. 60
  33. 8
  34. 45
  35. 5
  36. 3
  37. 8
  38. 22
  39. 13
  40. 5

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets