← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 630 · 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: x/6 + 3 = 11. What is x?
  2. 2.Solve: x/8 + 14 = 28. What is x?
  3. 3.Solve: 4(x + 5) = 48. What is x?
  4. 4.Rohan thinks of a number, multiplies it by 5 and then adds 6. The result is 46. What is the number?
  5. 5.Pooja’s mother is twice as old as Pooja. Their ages add up to 42 years. How old is Pooja?
  6. 6.Dev is 6 years older than a cousin. Their ages add up to 14 years. How old is the cousin?
  7. 7.Solve: 5y − 13 = 2. What is y?
  8. 8.Joseph thinks of a number, multiplies it by 5 and then adds 23. The result is 28. What is the number?
  9. 9.Solve: 3n + 5 = 44. What is n?
  10. 10.Aarav’s mother is four times as old as Aarav. Their ages add up to 50 years. How old is Aarav?
  11. 11.Solve: 7t + 10 = 52. What is t?
  12. 12.Solve: 4m + 4 = 32. What is m?
  13. 13.Solve: 3(p + 7) = 30. What is p?
  14. 14.Gurpreet thinks of a number, multiplies it by 2 and then adds 4. The result is 16. What is the number?
  15. 15.Riya is 3 years older than a cousin. Their ages add up to 29 years. How old is the cousin?
  16. 16.Solve: t/6 + 1 = 5. What is t?
  17. 17.Solve: 3(m + 5) = 48. What is m?
  18. 18.Solve: 8(m + 7) = 72. What is m?
  19. 19.Isha thinks of a number, multiplies it by 8 and then adds 14. The result is 54. What is the number?
  20. 20.Solve: 8y − 50 = 14. What is y?
  21. 21.Solve: 5x − 14 = 26. What is x?
  22. 22.Isha is 3 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  23. 23.Solve: 2(p + 7) = 32. What is p?
  24. 24.Solve: m/4 + 7 = 20. What is m?
  25. 25.Solve: 6(y + 2) = 54. What is y?
  26. 26.Solve: 6x + 7 = 73. What is x?
  27. 27.Tara’s mother is three times as old as Tara. Their ages add up to 20 years. How old is Tara?
  28. 28.Solve: 2p + 9 = 13. What is p?
  29. 29.Solve: 5x − 1 = 19. What is x?
  30. 30.Solve: 6(m + 1) = 54. What is m?
  31. 31.Solve: 2n + 22 = 38. What is n?
  32. 32.Solve: 6(t + 7) = 102. What is t?
  33. 33.Aditya is 3 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  34. 34.Riya thinks of a number, multiplies it by 3 and then adds 17. The result is 59. What is the number?
  35. 35.Riya is 5 years older than a cousin. Their ages add up to 15 years. How old is the cousin?
  36. 36.Kavya thinks of a number, multiplies it by 4 and then adds 4. The result is 44. What is the number?
  37. 37.Nisha is 8 years older than a cousin. Their ages add up to 34 years. How old is the cousin?
  38. 38.Solve: 5x + 11 = 66. What is x?
  39. 39.Meera’s mother is twice as old as Meera. Their ages add up to 36 years. How old is Meera?
  40. 40.Solve: 8(n + 5) = 48. What is n?

Answer key

  1. 48
  2. 112
  3. 7
  4. 8
  5. 14
  6. 4
  7. 3
  8. 1
  9. 13
  10. 10
  11. 6
  12. 7
  13. 3
  14. 6
  15. 13
  16. 24
  17. 11
  18. 2
  19. 5
  20. 8
  21. 8
  22. 12
  23. 9
  24. 52
  25. 7
  26. 11
  27. 5
  28. 2
  29. 4
  30. 8
  31. 8
  32. 10
  33. 7
  34. 14
  35. 5
  36. 10
  37. 13
  38. 11
  39. 12
  40. 1

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