← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 557 · 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.Saanvi’s mother is three times as old as Saanvi. Their ages add up to 32 years. How old is Saanvi?
  2. 2.Diya thinks of a number, multiplies it by 9 and then adds 3. The result is 93. What is the number?
  3. 3.Solve: m/9 + 11 = 21. What is m?
  4. 4.Solve: 8(n + 6) = 72. What is n?
  5. 5.Solve: 6(t + 7) = 102. What is t?
  6. 6.Tara’s mother is four times as old as Tara. Their ages add up to 50 years. How old is Tara?
  7. 7.Solve: m/7 + 17 = 27. What is m?
  8. 8.Solve: 3n + 6 = 21. What is n?
  9. 9.Solve: 8(m + 3) = 64. What is m?
  10. 10.Solve: 8m − 30 = 58. What is m?
  11. 11.Saanvi’s mother is four times as old as Saanvi. Their ages add up to 70 years. How old is Saanvi?
  12. 12.Farhan thinks of a number, multiplies it by 7 and then adds 18. The result is 67. What is the number?
  13. 13.Tara thinks of a number, multiplies it by 5 and then adds 22. The result is 67. What is the number?
  14. 14.Solve: 2m + 8 = 20. What is m?
  15. 15.Solve: 7m − 67 = 24. What is m?
  16. 16.Solve: 3x + 7 = 25. What is x?
  17. 17.Karan thinks of a number, multiplies it by 3 and then adds 17. The result is 53. What is the number?
  18. 18.Solve: 4(p + 3) = 52. What is p?
  19. 19.Solve: 4t + 18 = 62. What is t?
  20. 20.Kabir thinks of a number, multiplies it by 5 and then adds 2. The result is 72. What is the number?
  21. 21.Solve: 5(y + 7) = 75. What is y?
  22. 22.Isha’s mother is twice as old as Isha. Their ages add up to 39 years. How old is Isha?
  23. 23.Solve: t/3 + 13 = 16. What is t?
  24. 24.Solve: 3(x + 5) = 45. What is x?
  25. 25.Solve: 2y + 1 = 3. What is y?
  26. 26.Solve: 3t + 24 = 42. What is t?
  27. 27.Solve: 7m − 9 = 26. What is m?
  28. 28.Solve: m/2 + 12 = 14. What is m?
  29. 29.Solve: p/7 + 16 = 18. What is p?
  30. 30.Solve: 6t − 28 = 50. What is t?
  31. 31.Priya thinks of a number, multiplies it by 4 and then adds 3. The result is 59. What is the number?
  32. 32.Solve: 8p − 64 = 40. What is p?
  33. 33.Solve: 2(y + 4) = 18. What is y?
  34. 34.Solve: y/3 + 18 = 20. What is y?
  35. 35.Solve: 9y + 26 = 35. What is y?
  36. 36.Solve: 5(n + 8) = 45. What is n?
  37. 37.Dev is 2 years older than a cousin. Their ages add up to 10 years. How old is the cousin?
  38. 38.Solve: m/2 + 12 = 13. What is m?
  39. 39.Solve: 3x + 6 = 42. What is x?
  40. 40.Arjun thinks of a number, multiplies it by 2 and then adds 6. The result is 26. What is the number?

Answer key

  1. 8
  2. 10
  3. 90
  4. 3
  5. 10
  6. 10
  7. 70
  8. 5
  9. 5
  10. 11
  11. 14
  12. 7
  13. 9
  14. 6
  15. 13
  16. 6
  17. 12
  18. 10
  19. 11
  20. 14
  21. 8
  22. 13
  23. 9
  24. 10
  25. 1
  26. 6
  27. 5
  28. 4
  29. 14
  30. 13
  31. 14
  32. 13
  33. 5
  34. 6
  35. 1
  36. 1
  37. 4
  38. 2
  39. 12
  40. 10

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