← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 398 · 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: 8m + 29 = 69. What is m?
  2. 2.Solve: m/8 + 7 = 9. What is m?
  3. 3.Sneha thinks of a number, multiplies it by 3 and then adds 9. The result is 39. What is the number?
  4. 4.Solve: x/3 + 1 = 15. What is x?
  5. 5.Solve: m/4 + 7 = 12. What is m?
  6. 6.Solve: 8(y + 2) = 56. What is y?
  7. 7.Solve: p/4 + 11 = 15. What is p?
  8. 8.Solve: 6x + 30 = 54. What is x?
  9. 9.Meera thinks of a number, multiplies it by 3 and then adds 16. The result is 28. What is the number?
  10. 10.Solve: 7(m + 5) = 105. What is m?
  11. 11.Solve: 4x + 7 = 47. What is x?
  12. 12.Solve: 4t + 21 = 65. What is t?
  13. 13.Solve: x/3 + 2 = 8. What is x?
  14. 14.Riya thinks of a number, multiplies it by 6 and then adds 16. The result is 70. What is the number?
  15. 15.Rahul thinks of a number, multiplies it by 2 and then adds 27. The result is 55. What is the number?
  16. 16.Solve: 2(m + 9) = 34. What is m?
  17. 17.Solve: p/4 + 4 = 5. What is p?
  18. 18.Arjun thinks of a number, multiplies it by 2 and then adds 23. The result is 43. What is the number?
  19. 19.Solve: 5y + 12 = 72. What is y?
  20. 20.Solve: 2n + 19 = 31. What is n?
  21. 21.Solve: 4n − 2 = 2. What is n?
  22. 22.Rahul thinks of a number, multiplies it by 4 and then adds 12. The result is 44. What is the number?
  23. 23.Solve: 5p + 4 = 69. What is p?
  24. 24.Solve: 4p − 5 = 15. What is p?
  25. 25.Vivaan thinks of a number, multiplies it by 6 and then adds 27. The result is 51. What is the number?
  26. 26.Solve: y/9 + 7 = 9. What is y?
  27. 27.Solve: 3(m + 8) = 45. What is m?
  28. 28.Solve: 6(y + 7) = 54. What is y?
  29. 29.Solve: x/3 + 10 = 11. What is x?
  30. 30.Meera thinks of a number, multiplies it by 3 and then adds 17. The result is 59. What is the number?
  31. 31.Solve: 3(p + 5) = 45. What is p?
  32. 32.Meera thinks of a number, multiplies it by 4 and then adds 21. The result is 29. What is the number?
  33. 33.Solve: 3m − 6 = 6. What is m?
  34. 34.Solve: 2n − 12 = 6. What is n?
  35. 35.Solve: 9n − 21 = 78. What is n?
  36. 36.Solve: 6(y + 5) = 54. What is y?
  37. 37.Solve: 9m + 20 = 137. What is m?
  38. 38.Solve: 4x − 10 = 2. What is x?
  39. 39.Solve: 2y + 4 = 14. What is y?
  40. 40.Solve: 4t − 15 = 5. What is t?

Answer key

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

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