← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 306 · 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: p/5 + 6 = 11. What is p?
  2. 2.Joseph thinks of a number, multiplies it by 7 and then adds 13. The result is 20. What is the number?
  3. 3.Solve: 5t + 1 = 11. What is t?
  4. 4.Solve: 5m + 1 = 21. What is m?
  5. 5.Ishaan’s mother is three times as old as Ishaan. Their ages add up to 20 years. How old is Ishaan?
  6. 6.Gurpreet thinks of a number, multiplies it by 4 and then adds 1. The result is 57. What is the number?
  7. 7.Solve: 3y + 30 = 42. What is y?
  8. 8.Solve: 9m + 6 = 60. What is m?
  9. 9.Solve: 5(t + 4) = 40. What is t?
  10. 10.Solve: n/8 + 11 = 14. What is n?
  11. 11.Sneha is 3 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  12. 12.Solve: 2t − 16 = 8. What is t?
  13. 13.Meera’s mother is four times as old as Meera. Their ages add up to 20 years. How old is Meera?
  14. 14.Solve: 4(m + 5) = 24. What is m?
  15. 15.Vivaan’s mother is four times as old as Vivaan. Their ages add up to 75 years. How old is Vivaan?
  16. 16.Meera’s mother is three times as old as Meera. Their ages add up to 20 years. How old is Meera?
  17. 17.Solve: x/6 + 8 = 14. What is x?
  18. 18.Gurpreet thinks of a number, multiplies it by 3 and then adds 28. The result is 70. What is the number?
  19. 19.Solve: 8y − 69 = 19. What is y?
  20. 20.Solve: 9n + 2 = 101. What is n?
  21. 21.Solve: 6(y + 7) = 114. What is y?
  22. 22.Tara thinks of a number, multiplies it by 2 and then adds 11. The result is 27. What is the number?
  23. 23.Riya thinks of a number, multiplies it by 5 and then adds 29. The result is 74. What is the number?
  24. 24.Solve: n/3 + 14 = 21. What is n?
  25. 25.Solve: 7y + 15 = 22. What is y?
  26. 26.Solve: 6x + 30 = 48. What is x?
  27. 27.Solve: 6y − 31 = 23. What is y?
  28. 28.Vivaan thinks of a number, multiplies it by 6 and then adds 13. The result is 25. What is the number?
  29. 29.Solve: x/4 + 9 = 12. What is x?
  30. 30.Solve: 3(n + 2) = 18. What is n?
  31. 31.Diya thinks of a number, multiplies it by 3 and then adds 4. The result is 19. What is the number?
  32. 32.Solve: 2t + 21 = 45. What is t?
  33. 33.Kabir’s mother is three times as old as Kabir. Their ages add up to 56 years. How old is Kabir?
  34. 34.Arjun’s mother is four times as old as Arjun. Their ages add up to 60 years. How old is Arjun?
  35. 35.Solve: t/4 + 2 = 6. What is t?
  36. 36.Solve: 8y + 28 = 116. What is y?
  37. 37.Pooja thinks of a number, multiplies it by 3 and then adds 21. The result is 60. What is the number?
  38. 38.Solve: 4x − 37 = 23. What is x?
  39. 39.Aditya thinks of a number, multiplies it by 2 and then adds 28. The result is 36. What is the number?
  40. 40.Vivaan is 6 years older than a cousin. Their ages add up to 14 years. How old is the cousin?

Answer key

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

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