← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 894 · 40 sums
TalentJR

The method (Undo in reverse): ax + b = c → ax = c − b → x = (c − b) ÷ a. ax − b = c → ax = c + b. x/a + b = c → x/a = c − b → x = a × (c − b). a(x + b) = c → divide by a first: x + b = c ÷ a. Word problems: call the unknown x, write the equation, solve it, then check with the story.

NameDateTime takenScore ___ / 40
  1. 1.Solve: 2y + 27 = 39. What is y?
  2. 2.Priya thinks of a number, multiplies it by 4 and then adds 29. The result is 77. What is the number?
  3. 3.Solve: 4(m + 7) = 48. What is m?
  4. 4.Solve: y/2 + 14 = 24. What is y?
  5. 5.Solve: 9n − 67 = 59. What is n?
  6. 6.Solve: 9y − 70 = 56. What is y?
  7. 7.Rohan’s mother is three times as old as Rohan. Their ages add up to 28 years. How old is Rohan?
  8. 8.Solve: 9x + 6 = 141. What is x?
  9. 9.Ananya is 6 years older than a cousin. Their ages add up to 28 years. How old is the cousin?
  10. 10.Dev thinks of a number, multiplies it by 4 and then adds 14. The result is 26. What is the number?
  11. 11.Rohan thinks of a number, multiplies it by 6 and then adds 16. The result is 28. What is the number?
  12. 12.Solve: 8x + 4 = 28. What is x?
  13. 13.Solve: 6p − 5 = 13. What is p?
  14. 14.Diya thinks of a number, multiplies it by 7 and then adds 19. The result is 124. What is the number?
  15. 15.Kabir thinks of a number, multiplies it by 5 and then adds 24. The result is 49. What is the number?
  16. 16.Solve: 2(x + 9) = 44. What is x?
  17. 17.Solve: 3t + 23 = 65. What is t?
  18. 18.Solve: 7(t + 3) = 63. What is t?
  19. 19.Karan is 3 years older than a cousin. Their ages add up to 11 years. How old is the cousin?
  20. 20.Solve: 5t − 33 = 7. What is t?
  21. 21.Solve: 4p − 52 = 8. What is p?
  22. 22.Solve: 2m + 21 = 27. What is m?
  23. 23.Solve: 2m + 6 = 20. What is m?
  24. 24.Solve: 4(m + 2) = 64. What is m?
  25. 25.Solve: 8p − 8 = 32. What is p?
  26. 26.Solve: 5(n + 4) = 80. What is n?
  27. 27.Solve: 2p + 30 = 46. What is p?
  28. 28.Solve: y/4 + 8 = 23. What is y?
  29. 29.Solve: 4(m + 5) = 52. What is m?
  30. 30.Solve: 2x + 14 = 20. What is x?
  31. 31.Solve: 3(y + 4) = 30. What is y?
  32. 32.Solve: 2(n + 5) = 12. What is n?
  33. 33.Rahul is 2 years older than a cousin. Their ages add up to 22 years. How old is the cousin?
  34. 34.Solve: x/3 + 3 = 12. What is x?
  35. 35.Karan thinks of a number, multiplies it by 8 and then adds 28. The result is 44. What is the number?
  36. 36.Karan is 4 years older than a cousin. Their ages add up to 16 years. How old is the cousin?
  37. 37.Solve: 4m − 24 = 4. What is m?
  38. 38.Solve: n/9 + 19 = 28. What is n?
  39. 39.Solve: 5(x + 2) = 35. What is x?
  40. 40.Solve: n/7 + 6 = 15. What is n?

Answer key

  1. 6
  2. 12
  3. 5
  4. 20
  5. 14
  6. 14
  7. 7
  8. 15
  9. 11
  10. 3
  11. 2
  12. 3
  13. 3
  14. 15
  15. 5
  16. 13
  17. 14
  18. 6
  19. 4
  20. 8
  21. 15
  22. 3
  23. 7
  24. 14
  25. 5
  26. 12
  27. 8
  28. 60
  29. 8
  30. 3
  31. 6
  32. 1
  33. 10
  34. 27
  35. 2
  36. 6
  37. 7
  38. 81
  39. 5
  40. 63

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