← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 295 · 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: 2(t + 2) = 6. What is t?
  2. 2.Solve: 3t + 8 = 44. What is t?
  3. 3.Aditya’s mother is four times as old as Aditya. Their ages add up to 45 years. How old is Aditya?
  4. 4.Solve: 8y − 73 = 15. What is y?
  5. 5.Solve: 2m − 2 = 12. What is m?
  6. 6.Solve: 5x + 27 = 87. What is x?
  7. 7.Solve: 8t + 15 = 95. What is t?
  8. 8.Priya thinks of a number, multiplies it by 3 and then adds 11. The result is 20. What is the number?
  9. 9.Manav is 8 years older than a cousin. Their ages add up to 38 years. How old is the cousin?
  10. 10.Solve: y/8 + 11 = 14. What is y?
  11. 11.Dev thinks of a number, multiplies it by 6 and then adds 9. The result is 57. What is the number?
  12. 12.Solve: 8(n + 6) = 72. What is n?
  13. 13.Solve: 6m + 4 = 64. What is m?
  14. 14.Solve: 8p − 1 = 119. What is p?
  15. 15.Rahul thinks of a number, multiplies it by 5 and then adds 25. The result is 80. What is the number?
  16. 16.Solve: 5p + 29 = 89. What is p?
  17. 17.Solve: n/8 + 3 = 8. What is n?
  18. 18.Solve: 4t + 16 = 44. What is t?
  19. 19.Aarav’s mother is four times as old as Aarav. Their ages add up to 75 years. How old is Aarav?
  20. 20.Lakshmi thinks of a number, multiplies it by 2 and then adds 25. The result is 33. What is the number?
  21. 21.Tara is 8 years older than a cousin. Their ages add up to 36 years. How old is the cousin?
  22. 22.Rahul is 6 years older than a cousin. Their ages add up to 34 years. How old is the cousin?
  23. 23.Manav thinks of a number, multiplies it by 5 and then adds 8. The result is 73. What is the number?
  24. 24.Solve: 7(n + 9) = 84. What is n?
  25. 25.Solve: 3(n + 7) = 36. What is n?
  26. 26.Solve: 7(t + 3) = 70. What is t?
  27. 27.Solve: 4n − 5 = 7. What is n?
  28. 28.Zoya thinks of a number, multiplies it by 7 and then adds 12. The result is 40. What is the number?
  29. 29.Solve: 9x + 13 = 22. What is x?
  30. 30.Sneha’s mother is three times as old as Sneha. Their ages add up to 52 years. How old is Sneha?
  31. 31.Solve: 5(p + 7) = 90. What is p?
  32. 32.Solve: 6m + 18 = 24. What is m?
  33. 33.Solve: 8(x + 6) = 80. What is x?
  34. 34.Isha thinks of a number, multiplies it by 4 and then adds 8. The result is 20. What is the number?
  35. 35.Solve: 7t − 18 = 31. What is t?
  36. 36.Solve: 7n + 24 = 122. What is n?
  37. 37.Solve: 2p + 7 = 11. What is p?
  38. 38.Solve: 4(y + 4) = 68. What is y?
  39. 39.Solve: m/6 + 11 = 24. What is m?
  40. 40.Solve: 4n + 9 = 65. What is n?

Answer key

  1. 1
  2. 12
  3. 9
  4. 11
  5. 7
  6. 12
  7. 10
  8. 3
  9. 15
  10. 24
  11. 8
  12. 3
  13. 10
  14. 15
  15. 11
  16. 12
  17. 40
  18. 7
  19. 15
  20. 4
  21. 14
  22. 14
  23. 13
  24. 3
  25. 5
  26. 7
  27. 3
  28. 4
  29. 1
  30. 13
  31. 11
  32. 1
  33. 4
  34. 3
  35. 7
  36. 14
  37. 2
  38. 13
  39. 78
  40. 14

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