← Linear equations in one variable lesson New set →

Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 137 · 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 length of a rectangle is 1 cm more than its width. Its perimeter is 46 cm. What is its width (in cm)?
  2. 2.The length of a rectangle is 9 cm more than its width. Its perimeter is 126 cm. What is its width (in cm)?
  3. 3.Solve: n/2 + n/4 = 9. What is n?
  4. 4.The length of a rectangle is 6 cm more than its width. Its perimeter is 80 cm. What is its width (in cm)?
  5. 5.Solve: t/5 + t/3 = 40. What is t?
  6. 6.Solve: m/2 + m/6 = 28. What is m?
  7. 7.The sum of two consecutive whole numbers is 29. What is the smallest of them?
  8. 8.A father is 18 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?
  9. 9.A father is 48 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?
  10. 10.The length of a rectangle is 9 cm more than its width. Its perimeter is 34 cm. What is its width (in cm)?
  11. 11.The sum of two consecutive whole numbers is 11. What is the smallest of them?
  12. 12.The sum of three consecutive whole numbers is 24. What is the smallest of them?
  13. 13.Solve: 4(n − 5) = 2n + 14. What is n?
  14. 14.Solve: p/6 + p/3 = 18. What is p?
  15. 15.Solve: 3(p − 5) = 2p + 12. What is p?
  16. 16.The sum of two consecutive whole numbers is 27. What is the smallest of them?
  17. 17.The sum of two consecutive whole numbers is 119. What is the smallest of them?
  18. 18.Solve: 4(n − 5) = 3n + 11. What is n?
  19. 19.Solve: 5(m − 3) = 3m + 23. What is m?
  20. 20.Solve: 3(x − 2) = 2x + 13. What is x?
  21. 21.The sum of four consecutive whole numbers is 170. What is the smallest of them?
  22. 22.A father is 16 years older than his son. In 7 years, the father will be twice as old as his son. How old is the son now?
  23. 23.Solve: 6(y − 1) = y + 29. What is y?
  24. 24.The sum of three consecutive whole numbers is 123. What is the largest of them?
  25. 25.A father is 17 years older than his son. In 6 years, the father will be twice as old as his son. How old is the son now?
  26. 26.The sum of three consecutive whole numbers is 165. What is the largest of them?
  27. 27.Solve: p/2 + p/5 = 21. What is p?
  28. 28.A father is 24 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?
  29. 29.A father is 10 years older than his son. In 4 years, the father will be twice as old as his son. How old is the son now?
  30. 30.Solve: x/2 + x/3 = 40. What is x?
  31. 31.Solve: 9t + 13 = 6t + 34. What is t?
  32. 32.Solve: n/3 + n/5 = 24. What is n?
  33. 33.Solve: 6m + 4 = 4m + 32. What is m?
  34. 34.A father is 16 years older than his son. In 5 years, the father will be three times as old as his son. How old is the son now?
  35. 35.A father is 18 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?
  36. 36.Solve: 8p + 4 = 7p + 11. What is p?
  37. 37.Solve: 5(n − 1) = 2n + 34. What is n?
  38. 38.Solve: 6m + 6 = 4m + 10. What is m?
  39. 39.Solve: 6(x − 1) = 2x + 18. What is x?
  40. 40.Solve: 6(m − 1) = 2m + 42. What is m?

Answer key

  1. 11
  2. 27
  3. 12
  4. 17
  5. 75
  6. 42
  7. 14
  8. 8
  9. 9
  10. 4
  11. 5
  12. 7
  13. 17
  14. 36
  15. 27
  16. 13
  17. 59
  18. 31
  19. 19
  20. 19
  21. 41
  22. 9
  23. 7
  24. 42
  25. 11
  26. 56
  27. 30
  28. 8
  29. 6
  30. 48
  31. 7
  32. 45
  33. 14
  34. 3
  35. 5
  36. 7
  37. 13
  38. 2
  39. 6
  40. 12

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