← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 453 · 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: m/9 + 6 = 10. What is m?
  2. 2.Solve: 4(p + 9) = 84. What is p?
  3. 3.Pooja thinks of a number, multiplies it by 3 and then adds 6. The result is 45. What is the number?
  4. 4.Solve: 2m − 5 = 23. What is m?
  5. 5.Solve: n/2 + 14 = 22. What is n?
  6. 6.Manav’s mother is three times as old as Manav. Their ages add up to 16 years. How old is Manav?
  7. 7.Solve: 5p + 15 = 30. What is p?
  8. 8.Solve: n/2 + 15 = 24. What is n?
  9. 9.Solve: 8x − 7 = 1. What is x?
  10. 10.Solve: x/9 + 9 = 23. What is x?
  11. 11.Solve: 9p − 18 = 18. What is p?
  12. 12.Solve: 2t − 1 = 5. What is t?
  13. 13.Ananya thinks of a number, multiplies it by 2 and then adds 7. The result is 17. What is the number?
  14. 14.Solve: 9y + 24 = 33. What is y?
  15. 15.Solve: 5y − 10 = 55. What is y?
  16. 16.Priya’s mother is twice as old as Priya. Their ages add up to 45 years. How old is Priya?
  17. 17.Solve: 3(t + 5) = 57. What is t?
  18. 18.Solve: 4p + 9 = 41. What is p?
  19. 19.Solve: 3t + 26 = 50. What is t?
  20. 20.Solve: 4x + 26 = 78. What is x?
  21. 21.Solve: 4(n + 6) = 76. What is n?
  22. 22.Solve: n/2 + 5 = 17. What is n?
  23. 23.Solve: 7(y + 9) = 126. What is y?
  24. 24.Diya thinks of a number, multiplies it by 9 and then adds 15. The result is 42. What is the number?
  25. 25.Karan thinks of a number, multiplies it by 8 and then adds 9. The result is 81. What is the number?
  26. 26.Solve: 9(p + 8) = 198. What is p?
  27. 27.Solve: 4x + 17 = 21. What is x?
  28. 28.Solve: n/8 + 19 = 23. What is n?
  29. 29.Solve: 7m + 10 = 52. What is m?
  30. 30.Solve: 3x + 30 = 60. What is x?
  31. 31.Priya’s mother is twice as old as Priya. Their ages add up to 18 years. How old is Priya?
  32. 32.Solve: 2t − 2 = 2. What is t?
  33. 33.Solve: 5y − 39 = 36. What is y?
  34. 34.Rahul thinks of a number, multiplies it by 4 and then adds 21. The result is 37. What is the number?
  35. 35.Kabir thinks of a number, multiplies it by 7 and then adds 17. The result is 73. What is the number?
  36. 36.Solve: m/2 + 7 = 16. What is m?
  37. 37.Solve: p/3 + 6 = 14. What is p?
  38. 38.Solve: 6n − 50 = 28. What is n?
  39. 39.Solve: n/9 + 17 = 30. What is n?
  40. 40.Solve: 5(x + 1) = 30. What is x?

Answer key

  1. 36
  2. 12
  3. 13
  4. 14
  5. 16
  6. 4
  7. 3
  8. 18
  9. 1
  10. 126
  11. 4
  12. 3
  13. 5
  14. 1
  15. 13
  16. 15
  17. 14
  18. 8
  19. 8
  20. 13
  21. 13
  22. 24
  23. 9
  24. 3
  25. 9
  26. 14
  27. 1
  28. 32
  29. 6
  30. 10
  31. 6
  32. 2
  33. 15
  34. 4
  35. 8
  36. 18
  37. 24
  38. 13
  39. 117
  40. 5

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