← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 324 · 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: 9(t + 9) = 153. What is t?
  2. 2.Arjun thinks of a number, multiplies it by 3 and then adds 4. The result is 25. What is the number?
  3. 3.Solve: m/4 + 1 = 3. What is m?
  4. 4.Solve: 6(x + 2) = 90. What is x?
  5. 5.Joseph’s mother is twice as old as Joseph. Their ages add up to 30 years. How old is Joseph?
  6. 6.Solve: 8(n + 4) = 120. What is n?
  7. 7.Solve: 5n − 28 = 37. What is n?
  8. 8.Solve: 5x + 12 = 42. What is x?
  9. 9.Solve: p/8 + 1 = 6. What is p?
  10. 10.Riya is 7 years older than a cousin. Their ages add up to 37 years. How old is the cousin?
  11. 11.Solve: 9(t + 8) = 162. What is t?
  12. 12.Solve: 4m − 41 = 19. What is m?
  13. 13.Solve: 2(m + 1) = 4. What is m?
  14. 14.Aditya thinks of a number, multiplies it by 7 and then adds 28. The result is 56. What is the number?
  15. 15.Solve: 2t − 1 = 1. What is t?
  16. 16.Solve: n/3 + 13 = 16. What is n?
  17. 17.Solve: 2m + 19 = 47. What is m?
  18. 18.Solve: 2t + 16 = 46. What is t?
  19. 19.Solve: 2t + 21 = 39. What is t?
  20. 20.Solve: 8p − 9 = 23. What is p?
  21. 21.Solve: 3x − 9 = 6. What is x?
  22. 22.Solve: 5y − 6 = 39. What is y?
  23. 23.Diya is 6 years older than a cousin. Their ages add up to 16 years. How old is the cousin?
  24. 24.Solve: 6x − 2 = 76. What is x?
  25. 25.Solve: 5m + 4 = 29. What is m?
  26. 26.Solve: 7t − 21 = 21. What is t?
  27. 27.Dev thinks of a number, multiplies it by 5 and then adds 14. The result is 64. What is the number?
  28. 28.Solve: 4t − 6 = 54. What is t?
  29. 29.Pooja thinks of a number, multiplies it by 6 and then adds 17. The result is 101. What is the number?
  30. 30.Vivaan is 5 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  31. 31.Solve: 4y − 4 = 16. What is y?
  32. 32.Solve: 6n + 17 = 107. What is n?
  33. 33.Solve: y/5 + 6 = 7. What is y?
  34. 34.Ananya is 6 years older than a cousin. Their ages add up to 36 years. How old is the cousin?
  35. 35.Solve: 2y − 7 = 11. What is y?
  36. 36.Solve: 2n − 2 = 28. What is n?
  37. 37.Solve: 5n − 14 = 41. What is n?
  38. 38.Solve: 6x + 18 = 48. What is x?
  39. 39.Pooja thinks of a number, multiplies it by 2 and then adds 5. The result is 35. What is the number?
  40. 40.Solve: 3x − 5 = 1. What is x?

Answer key

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

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