← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 728 · 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: 8x + 29 = 77. What is x?
  2. 2.Solve: 6t + 19 = 61. What is t?
  3. 3.Solve: n/9 + 13 = 24. What is n?
  4. 4.Solve: 6(t + 6) = 48. What is t?
  5. 5.Solve: 6y − 51 = 15. What is y?
  6. 6.Solve: 4t − 7 = 1. What is t?
  7. 7.Tara is 1 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  8. 8.Solve: t/9 + 1 = 15. What is t?
  9. 9.Solve: 4n + 16 = 60. What is n?
  10. 10.Solve: p/3 + 7 = 13. What is p?
  11. 11.Solve: 6(p + 4) = 84. What is p?
  12. 12.Solve: 2y + 30 = 50. What is y?
  13. 13.Meera is 4 years older than a cousin. Their ages add up to 14 years. How old is the cousin?
  14. 14.Solve: 7p + 25 = 102. What is p?
  15. 15.Manav’s mother is three times as old as Manav. Their ages add up to 56 years. How old is Manav?
  16. 16.Solve: 3(m + 9) = 45. What is m?
  17. 17.Farhan is 5 years older than a cousin. Their ages add up to 13 years. How old is the cousin?
  18. 18.Solve: 4n + 22 = 46. What is n?
  19. 19.Solve: 3(t + 4) = 33. What is t?
  20. 20.Solve: 5n + 23 = 43. What is n?
  21. 21.Solve: 2m − 1 = 1. What is m?
  22. 22.Solve: p/7 + 17 = 24. What is p?
  23. 23.Vivaan thinks of a number, multiplies it by 5 and then adds 19. The result is 64. What is the number?
  24. 24.Solve: 4m − 1 = 7. What is m?
  25. 25.Solve: x/9 + 2 = 3. What is x?
  26. 26.Solve: 7p − 33 = 2. What is p?
  27. 27.Solve: 8n + 2 = 122. What is n?
  28. 28.Solve: 9p + 29 = 74. What is p?
  29. 29.Diya’s mother is twice as old as Diya. Their ages add up to 36 years. How old is Diya?
  30. 30.Karan is 5 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  31. 31.Solve: 2(x + 4) = 14. What is x?
  32. 32.Meera thinks of a number, multiplies it by 6 and then adds 30. The result is 72. What is the number?
  33. 33.Solve: t/3 + 2 = 13. What is t?
  34. 34.Solve: 2p + 30 = 50. What is p?
  35. 35.Solve: n/8 + 10 = 21. What is n?
  36. 36.Solve: 3n − 11 = 25. What is n?
  37. 37.Karan is 8 years older than a cousin. Their ages add up to 30 years. How old is the cousin?
  38. 38.Solve: 2m − 14 = 4. What is m?
  39. 39.Solve: 3y − 12 = 21. What is y?
  40. 40.Solve: m/5 + 4 = 19. What is m?

Answer key

  1. 6
  2. 7
  3. 99
  4. 2
  5. 11
  6. 2
  7. 8
  8. 126
  9. 11
  10. 18
  11. 10
  12. 10
  13. 5
  14. 11
  15. 14
  16. 6
  17. 4
  18. 6
  19. 7
  20. 4
  21. 1
  22. 49
  23. 9
  24. 2
  25. 9
  26. 5
  27. 15
  28. 5
  29. 12
  30. 9
  31. 3
  32. 7
  33. 33
  34. 10
  35. 88
  36. 12
  37. 11
  38. 9
  39. 11
  40. 75

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