← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 377 · 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.Manav thinks of a number, multiplies it by 6 and then adds 26. The result is 38. What is the number?
  2. 2.Solve: 8(t + 3) = 40. What is t?
  3. 3.Solve: 4x + 19 = 75. What is x?
  4. 4.Tara thinks of a number, multiplies it by 3 and then adds 29. The result is 62. What is the number?
  5. 5.Kavya is 6 years older than a cousin. Their ages add up to 16 years. How old is the cousin?
  6. 6.Rohan thinks of a number, multiplies it by 5 and then adds 2. The result is 32. What is the number?
  7. 7.Solve: 4n − 10 = 10. What is n?
  8. 8.Solve: 8x + 24 = 32. What is x?
  9. 9.Saanvi thinks of a number, multiplies it by 8 and then adds 4. The result is 36. What is the number?
  10. 10.Solve: 9y + 30 = 66. What is y?
  11. 11.Solve: 3x + 10 = 55. What is x?
  12. 12.Tara is 7 years older than a cousin. Their ages add up to 31 years. How old is the cousin?
  13. 13.Lakshmi is 1 years older than a cousin. Their ages add up to 11 years. How old is the cousin?
  14. 14.Ishaan thinks of a number, multiplies it by 9 and then adds 2. The result is 38. What is the number?
  15. 15.Solve: 9y + 30 = 39. What is y?
  16. 16.Solve: 8(y + 9) = 88. What is y?
  17. 17.Solve: 6(p + 4) = 42. What is p?
  18. 18.Solve: 4(y + 2) = 16. What is y?
  19. 19.Zoya’s mother is twice as old as Zoya. Their ages add up to 42 years. How old is Zoya?
  20. 20.Solve: 9x − 11 = 88. What is x?
  21. 21.Solve: 6(y + 1) = 78. What is y?
  22. 22.Solve: p/6 + 20 = 27. What is p?
  23. 23.Solve: 6m + 16 = 22. What is m?
  24. 24.Solve: 3(p + 1) = 33. What is p?
  25. 25.Solve: 9y − 10 = 107. What is y?
  26. 26.Pooja thinks of a number, multiplies it by 6 and then adds 2. The result is 50. What is the number?
  27. 27.Gurpreet thinks of a number, multiplies it by 4 and then adds 26. The result is 78. What is the number?
  28. 28.Gurpreet thinks of a number, multiplies it by 6 and then adds 15. The result is 45. What is the number?
  29. 29.Solve: 8(p + 6) = 152. What is p?
  30. 30.Solve: 2(x + 9) = 44. What is x?
  31. 31.Solve: 4x + 11 = 51. What is x?
  32. 32.Aditya’s mother is three times as old as Aditya. Their ages add up to 24 years. How old is Aditya?
  33. 33.Solve: 2y − 5 = 5. What is y?
  34. 34.Solve: 7x − 9 = 19. What is x?
  35. 35.Solve: 7(y + 6) = 147. What is y?
  36. 36.Farhan thinks of a number, multiplies it by 8 and then adds 13. The result is 101. What is the number?
  37. 37.Solve: 8t − 9 = 71. What is t?
  38. 38.Solve: p/3 + 18 = 28. What is p?
  39. 39.Solve: t/7 + 12 = 15. What is t?
  40. 40.Solve: m/7 + 20 = 22. What is m?

Answer key

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

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