← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 220 · 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: 2x + 5 = 15. What is x?
  2. 2.Solve: 9n + 4 = 130. What is n?
  3. 3.Solve: 3y + 25 = 55. What is y?
  4. 4.Solve: 7(p + 1) = 70. What is p?
  5. 5.Diya thinks of a number, multiplies it by 2 and then adds 6. The result is 12. What is the number?
  6. 6.Lakshmi is 4 years older than a cousin. Their ages add up to 26 years. How old is the cousin?
  7. 7.Solve: 2m + 24 = 44. What is m?
  8. 8.Pooja thinks of a number, multiplies it by 4 and then adds 13. The result is 49. What is the number?
  9. 9.Solve: 3t − 15 = 24. What is t?
  10. 10.Solve: 2p − 4 = 10. What is p?
  11. 11.Solve: 9(y + 2) = 144. What is y?
  12. 12.Solve: p/5 + 7 = 8. What is p?
  13. 13.Solve: m/4 + 1 = 5. What is m?
  14. 14.Solve: x/8 + 4 = 13. What is x?
  15. 15.Rohan thinks of a number, multiplies it by 8 and then adds 7. The result is 79. What is the number?
  16. 16.Solve: t/5 + 2 = 5. What is t?
  17. 17.Solve: 8p − 22 = 34. What is p?
  18. 18.Solve: 4(y + 7) = 68. What is y?
  19. 19.Solve: 2(n + 6) = 30. What is n?
  20. 20.Solve: 8(n + 2) = 88. What is n?
  21. 21.Solve: 4m + 14 = 18. What is m?
  22. 22.Ishaan is 1 years older than a cousin. Their ages add up to 25 years. How old is the cousin?
  23. 23.Solve: 2p − 10 = 14. What is p?
  24. 24.Solve: x/2 + 17 = 19. What is x?
  25. 25.Rohan is 6 years older than a cousin. Their ages add up to 28 years. How old is the cousin?
  26. 26.Solve: 7p − 17 = 53. What is p?
  27. 27.Solve: 8p − 4 = 52. What is p?
  28. 28.Solve: 6p + 1 = 85. What is p?
  29. 29.Solve: 8t + 24 = 64. What is t?
  30. 30.Solve: 3n + 21 = 24. What is n?
  31. 31.Solve: m/6 + 12 = 21. What is m?
  32. 32.Solve: 9(y + 6) = 72. What is y?
  33. 33.Solve: 3t + 12 = 21. What is t?
  34. 34.Tara thinks of a number, multiplies it by 9 and then adds 23. The result is 158. What is the number?
  35. 35.Solve: 2x − 4 = 20. What is x?
  36. 36.Aarav thinks of a number, multiplies it by 5 and then adds 25. The result is 60. What is the number?
  37. 37.Solve: 4(m + 9) = 92. What is m?
  38. 38.Solve: 6p + 23 = 101. What is p?
  39. 39.Solve: 3n − 10 = 29. What is n?
  40. 40.Ananya thinks of a number, multiplies it by 3 and then adds 5. The result is 29. What is the number?

Answer key

  1. 5
  2. 14
  3. 10
  4. 9
  5. 3
  6. 11
  7. 10
  8. 9
  9. 13
  10. 7
  11. 14
  12. 5
  13. 16
  14. 72
  15. 9
  16. 15
  17. 7
  18. 10
  19. 9
  20. 9
  21. 1
  22. 12
  23. 12
  24. 4
  25. 11
  26. 10
  27. 7
  28. 14
  29. 5
  30. 1
  31. 54
  32. 2
  33. 3
  34. 15
  35. 12
  36. 7
  37. 14
  38. 13
  39. 13
  40. 8

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