← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 404 · 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: n/5 + 2 = 11. What is n?
  2. 2.Solve: 9p + 14 = 95. What is p?
  3. 3.Solve: 2t + 5 = 35. What is t?
  4. 4.Solve: 2x + 2 = 30. What is x?
  5. 5.Manav thinks of a number, multiplies it by 9 and then adds 5. The result is 14. What is the number?
  6. 6.Karan is 7 years older than a cousin. Their ages add up to 29 years. How old is the cousin?
  7. 7.Solve: t/9 + 7 = 9. What is t?
  8. 8.Solve: 6m − 29 = 37. What is m?
  9. 9.Solve: 2y + 7 = 13. What is y?
  10. 10.Solve: 7p + 22 = 99. What is p?
  11. 11.Manav thinks of a number, multiplies it by 4 and then adds 7. The result is 19. What is the number?
  12. 12.Solve: 4m − 24 = 32. What is m?
  13. 13.Solve: 2n + 4 = 26. What is n?
  14. 14.Solve: 9t + 25 = 70. What is t?
  15. 15.Solve: 8p + 19 = 75. What is p?
  16. 16.Solve: 2y + 23 = 33. What is y?
  17. 17.Solve: 3(x + 9) = 36. What is x?
  18. 18.Solve: 5y + 14 = 34. What is y?
  19. 19.Solve: 3m + 4 = 49. What is m?
  20. 20.Solve: 2p − 5 = 15. What is p?
  21. 21.Solve: 6m − 8 = 28. What is m?
  22. 22.Lakshmi thinks of a number, multiplies it by 4 and then adds 18. The result is 46. What is the number?
  23. 23.Solve: 2(y + 8) = 36. What is y?
  24. 24.Solve: 4(x + 5) = 80. What is x?
  25. 25.Solve: 5y + 11 = 76. What is y?
  26. 26.Solve: y/4 + 17 = 21. What is y?
  27. 27.Kavya is 6 years older than a cousin. Their ages add up to 24 years. How old is the cousin?
  28. 28.Solve: 9x − 15 = 3. What is x?
  29. 29.Solve: 3(y + 9) = 42. What is y?
  30. 30.Solve: 5n − 3 = 22. What is n?
  31. 31.Meera is 8 years older than a cousin. Their ages add up to 32 years. How old is the cousin?
  32. 32.Solve: 4y + 16 = 64. What is y?
  33. 33.Solve: 3(m + 2) = 48. What is m?
  34. 34.Solve: 5y + 14 = 79. What is y?
  35. 35.Solve: 2(y + 5) = 28. What is y?
  36. 36.Solve: p/5 + 10 = 23. What is p?
  37. 37.Solve: p/8 + 9 = 12. What is p?
  38. 38.Solve: 5(y + 3) = 55. What is y?
  39. 39.Solve: 8p − 44 = 4. What is p?
  40. 40.Solve: m/8 + 12 = 16. What is m?

Answer key

  1. 45
  2. 9
  3. 15
  4. 14
  5. 1
  6. 11
  7. 18
  8. 11
  9. 3
  10. 11
  11. 3
  12. 14
  13. 11
  14. 5
  15. 7
  16. 5
  17. 3
  18. 4
  19. 15
  20. 10
  21. 6
  22. 7
  23. 10
  24. 15
  25. 13
  26. 16
  27. 9
  28. 2
  29. 5
  30. 5
  31. 12
  32. 12
  33. 14
  34. 13
  35. 9
  36. 65
  37. 24
  38. 8
  39. 6
  40. 32

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