← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 64 · 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: 6m + 6 = 36. What is m?
  2. 2.Gurpreet’s mother is three times as old as Gurpreet. Their ages add up to 28 years. How old is Gurpreet?
  3. 3.Solve: 6y − 2 = 10. What is y?
  4. 4.Solve: 5x − 1 = 4. What is x?
  5. 5.Solve: 7(x + 1) = 84. What is x?
  6. 6.Kabir’s mother is four times as old as Kabir. Their ages add up to 60 years. How old is Kabir?
  7. 7.Ananya thinks of a number, multiplies it by 6 and then adds 18. The result is 48. What is the number?
  8. 8.Isha is 5 years older than a cousin. Their ages add up to 21 years. How old is the cousin?
  9. 9.Solve: 9m − 74 = 52. What is m?
  10. 10.Solve: p/3 + 2 = 11. What is p?
  11. 11.Solve: 2n − 2 = 2. What is n?
  12. 12.Solve: 2p − 6 = 14. What is p?
  13. 13.Solve: 8n − 63 = 41. What is n?
  14. 14.Solve: 4x + 4 = 36. What is x?
  15. 15.Solve: 7(n + 8) = 77. What is n?
  16. 16.Solve: 9m + 1 = 109. What is m?
  17. 17.Solve: t/7 + 2 = 7. What is t?
  18. 18.Solve: 6y + 10 = 100. What is y?
  19. 19.Manav is 2 years older than a cousin. Their ages add up to 20 years. How old is the cousin?
  20. 20.Aditya is 5 years older than a cousin. Their ages add up to 21 years. How old is the cousin?
  21. 21.Solve: 2y + 26 = 46. What is y?
  22. 22.Solve: 5n + 8 = 53. What is n?
  23. 23.Solve: 5t + 1 = 66. What is t?
  24. 24.Meera is 4 years older than a cousin. Their ages add up to 20 years. How old is the cousin?
  25. 25.Solve: x/6 + 19 = 28. What is x?
  26. 26.Solve: y/9 + 17 = 28. What is y?
  27. 27.Pooja thinks of a number, multiplies it by 3 and then adds 28. The result is 64. What is the number?
  28. 28.Solve: 7m − 30 = 5. What is m?
  29. 29.Solve: 2y − 8 = 18. What is y?
  30. 30.Solve: 2y + 26 = 40. What is y?
  31. 31.Solve: 7p + 22 = 120. What is p?
  32. 32.Solve: x/5 + 17 = 21. What is x?
  33. 33.Solve: 6n + 4 = 88. What is n?
  34. 34.Farhan thinks of a number, multiplies it by 3 and then adds 14. The result is 32. What is the number?
  35. 35.Solve: 7m + 30 = 44. What is m?
  36. 36.Solve: 9n − 53 = 28. What is n?
  37. 37.Solve: 5n − 29 = 41. What is n?
  38. 38.Saanvi’s mother is three times as old as Saanvi. Their ages add up to 20 years. How old is Saanvi?
  39. 39.Solve: 3p + 4 = 22. What is p?
  40. 40.Solve: 3x + 9 = 21. What is x?

Answer key

  1. 5
  2. 7
  3. 2
  4. 1
  5. 11
  6. 12
  7. 5
  8. 8
  9. 14
  10. 27
  11. 2
  12. 10
  13. 13
  14. 8
  15. 3
  16. 12
  17. 35
  18. 15
  19. 9
  20. 8
  21. 10
  22. 9
  23. 13
  24. 8
  25. 54
  26. 99
  27. 12
  28. 5
  29. 13
  30. 7
  31. 14
  32. 20
  33. 14
  34. 6
  35. 2
  36. 9
  37. 14
  38. 5
  39. 6
  40. 4

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