← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 987 · 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: 5p − 26 = 9. What is p?
  2. 2.Rahul is 1 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  3. 3.Solve: 6m − 55 = 29. What is m?
  4. 4.Nisha thinks of a number, multiplies it by 4 and then adds 5. The result is 13. What is the number?
  5. 5.Solve: 6(x + 3) = 90. What is x?
  6. 6.Farhan is 5 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  7. 7.Karan thinks of a number, multiplies it by 2 and then adds 27. The result is 47. What is the number?
  8. 8.Solve: 5p + 1 = 31. What is p?
  9. 9.Sneha thinks of a number, multiplies it by 9 and then adds 13. The result is 139. What is the number?
  10. 10.Solve: 8n − 32 = 32. What is n?
  11. 11.Solve: 8(t + 7) = 64. What is t?
  12. 12.Solve: n/7 + 13 = 23. What is n?
  13. 13.Solve: 5x − 43 = 2. What is x?
  14. 14.Solve: 5(n + 4) = 60. What is n?
  15. 15.Karan is 7 years older than a cousin. Their ages add up to 31 years. How old is the cousin?
  16. 16.Solve: 5t − 28 = 42. What is t?
  17. 17.Sneha’s mother is twice as old as Sneha. Their ages add up to 45 years. How old is Sneha?
  18. 18.Solve: 5x − 21 = 24. What is x?
  19. 19.Solve: 3(m + 2) = 12. What is m?
  20. 20.Solve: y/2 + 2 = 7. What is y?
  21. 21.Solve: 2(x + 1) = 10. What is x?
  22. 22.Solve: 9(p + 7) = 117. What is p?
  23. 23.Aditya thinks of a number, multiplies it by 7 and then adds 14. The result is 21. What is the number?
  24. 24.Solve: y/5 + 6 = 19. What is y?
  25. 25.Solve: t/5 + 10 = 12. What is t?
  26. 26.Solve: y/4 + 12 = 19. What is y?
  27. 27.Riya is 1 years older than a cousin. Their ages add up to 11 years. How old is the cousin?
  28. 28.Solve: 6y − 14 = 28. What is y?
  29. 29.Solve: t/5 + 11 = 12. What is t?
  30. 30.Solve: 6n − 1 = 41. What is n?
  31. 31.Solve: 7(y + 7) = 154. What is y?
  32. 32.Tara is 2 years older than a cousin. Their ages add up to 12 years. How old is the cousin?
  33. 33.Solve: 6m − 19 = 53. What is m?
  34. 34.Solve: 7(y + 8) = 133. What is y?
  35. 35.Solve: 3y − 4 = 5. What is y?
  36. 36.Solve: p/9 + 6 = 9. What is p?
  37. 37.Solve: 4n − 6 = 6. What is n?
  38. 38.Meera thinks of a number, multiplies it by 4 and then adds 16. The result is 72. What is the number?
  39. 39.Pooja thinks of a number, multiplies it by 3 and then adds 26. The result is 68. What is the number?
  40. 40.Solve: 7t + 20 = 34. What is t?

Answer key

  1. 7
  2. 11
  3. 14
  4. 2
  5. 12
  6. 11
  7. 10
  8. 6
  9. 14
  10. 8
  11. 1
  12. 70
  13. 9
  14. 8
  15. 12
  16. 14
  17. 15
  18. 9
  19. 2
  20. 10
  21. 4
  22. 6
  23. 1
  24. 65
  25. 10
  26. 28
  27. 5
  28. 7
  29. 5
  30. 7
  31. 15
  32. 5
  33. 12
  34. 11
  35. 3
  36. 27
  37. 3
  38. 14
  39. 14
  40. 2

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