← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 781 · 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: 8(t + 8) = 80. What is t?
  2. 2.Solve: 3x − 2 = 1. What is x?
  3. 3.Solve: m/4 + 12 = 13. What is m?
  4. 4.Solve: 2m + 28 = 34. What is m?
  5. 5.Saanvi is 4 years older than a cousin. Their ages add up to 24 years. How old is the cousin?
  6. 6.Isha is 7 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  7. 7.Solve: 2t + 9 = 37. What is t?
  8. 8.Solve: m/7 + 5 = 13. What is m?
  9. 9.Farhan thinks of a number, multiplies it by 5 and then adds 27. The result is 47. What is the number?
  10. 10.Solve: 2(n + 2) = 32. What is n?
  11. 11.Solve: x/3 + 15 = 26. What is x?
  12. 12.Solve: 6(m + 9) = 66. What is m?
  13. 13.Meera’s mother is three times as old as Meera. Their ages add up to 48 years. How old is Meera?
  14. 14.Solve: p/4 + 7 = 19. What is p?
  15. 15.Solve: 7m − 16 = 5. What is m?
  16. 16.Solve: 9m + 22 = 139. What is m?
  17. 17.Solve: 9(n + 5) = 99. What is n?
  18. 18.Solve: 3p + 10 = 37. What is p?
  19. 19.Solve: m/7 + 6 = 7. What is m?
  20. 20.Tara’s mother is four times as old as Tara. Their ages add up to 35 years. How old is Tara?
  21. 21.Zoya’s mother is twice as old as Zoya. Their ages add up to 36 years. How old is Zoya?
  22. 22.Solve: y/7 + 19 = 34. What is y?
  23. 23.Solve: t/5 + 4 = 8. What is t?
  24. 24.Solve: 5y + 29 = 64. What is y?
  25. 25.Solve: 8(m + 5) = 72. What is m?
  26. 26.Solve: 7t + 19 = 96. What is t?
  27. 27.Solve: 2t − 5 = 9. What is t?
  28. 28.Solve: 2x − 20 = 6. What is x?
  29. 29.Solve: 4n + 21 = 29. What is n?
  30. 30.Karan thinks of a number, multiplies it by 8 and then adds 22. The result is 102. What is the number?
  31. 31.Solve: 6(n + 2) = 48. What is n?
  32. 32.Solve: n/4 + 3 = 14. What is n?
  33. 33.Solve: 3x + 10 = 19. What is x?
  34. 34.Solve: 3n + 29 = 74. What is n?
  35. 35.Tara is 2 years older than a cousin. Their ages add up to 28 years. How old is the cousin?
  36. 36.Solve: 5t − 12 = 43. What is t?
  37. 37.Solve: 4m + 22 = 34. What is m?
  38. 38.Solve: 3(p + 1) = 24. What is p?
  39. 39.Solve: y/6 + 5 = 10. What is y?
  40. 40.Pooja thinks of a number, multiplies it by 4 and then adds 16. The result is 28. What is the number?

Answer key

  1. 2
  2. 1
  3. 4
  4. 3
  5. 10
  6. 8
  7. 14
  8. 56
  9. 4
  10. 14
  11. 33
  12. 2
  13. 12
  14. 48
  15. 3
  16. 13
  17. 6
  18. 9
  19. 7
  20. 7
  21. 12
  22. 105
  23. 20
  24. 7
  25. 4
  26. 11
  27. 7
  28. 13
  29. 2
  30. 10
  31. 6
  32. 44
  33. 3
  34. 15
  35. 13
  36. 11
  37. 3
  38. 7
  39. 30
  40. 3

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