← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 642 · 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: 8(p + 6) = 88. What is p?
  2. 2.Solve: 8p − 44 = 20. What is p?
  3. 3.Solve: 2(t + 1) = 30. What is t?
  4. 4.Manav thinks of a number, multiplies it by 8 and then adds 21. The result is 45. What is the number?
  5. 5.Meera is 2 years older than a cousin. Their ages add up to 28 years. How old is the cousin?
  6. 6.Solve: 9n + 25 = 61. What is n?
  7. 7.Solve: y/9 + 7 = 12. What is y?
  8. 8.Karan thinks of a number, multiplies it by 2 and then adds 5. The result is 19. What is the number?
  9. 9.Solve: 2x − 26 = 4. What is x?
  10. 10.Solve: y/5 + 6 = 9. What is y?
  11. 11.Gurpreet thinks of a number, multiplies it by 8 and then adds 12. The result is 84. What is the number?
  12. 12.Aditya is 7 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  13. 13.Lakshmi thinks of a number, multiplies it by 8 and then adds 6. The result is 30. What is the number?
  14. 14.Solve: 9(x + 4) = 45. What is x?
  15. 15.Solve: x/7 + 16 = 17. What is x?
  16. 16.Solve: 4y − 4 = 4. What is y?
  17. 17.Meera thinks of a number, multiplies it by 7 and then adds 18. The result is 81. What is the number?
  18. 18.Solve: 9y + 25 = 34. What is y?
  19. 19.Saanvi thinks of a number, multiplies it by 7 and then adds 30. The result is 37. What is the number?
  20. 20.Solve: y/7 + 6 = 9. What is y?
  21. 21.Solve: 7n + 26 = 75. What is n?
  22. 22.Solve: 9(y + 4) = 72. What is y?
  23. 23.Karan thinks of a number, multiplies it by 9 and then adds 24. The result is 141. What is the number?
  24. 24.Solve: 7m + 17 = 115. What is m?
  25. 25.Solve: 2x + 14 = 36. What is x?
  26. 26.Kavya thinks of a number, multiplies it by 8 and then adds 13. The result is 29. What is the number?
  27. 27.Diya is 6 years older than a cousin. Their ages add up to 36 years. How old is the cousin?
  28. 28.Rahul thinks of a number, multiplies it by 9 and then adds 28. The result is 127. What is the number?
  29. 29.Solve: 8p − 61 = 11. What is p?
  30. 30.Solve: p/2 + 11 = 16. What is p?
  31. 31.Aarav thinks of a number, multiplies it by 9 and then adds 19. The result is 118. What is the number?
  32. 32.Solve: 2(t + 2) = 22. What is t?
  33. 33.Solve: 3x + 22 = 67. What is x?
  34. 34.Solve: p/3 + 12 = 14. What is p?
  35. 35.Solve: 8(x + 6) = 64. What is x?
  36. 36.Solve: 2(n + 7) = 18. What is n?
  37. 37.Isha thinks of a number, multiplies it by 3 and then adds 18. The result is 60. What is the number?
  38. 38.Solve: 2(m + 7) = 24. What is m?
  39. 39.Solve: 8x − 27 = 5. What is x?
  40. 40.Solve: y/5 + 4 = 9. What is y?

Answer key

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

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