← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 828 · 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: 3x + 18 = 30. What is x?
  2. 2.Solve: 4n − 4 = 4. What is n?
  3. 3.Solve: 5t − 9 = 16. What is t?
  4. 4.Joseph is 5 years older than a cousin. Their ages add up to 13 years. How old is the cousin?
  5. 5.Solve: 3p + 21 = 48. What is p?
  6. 6.Ishaan thinks of a number, multiplies it by 4 and then adds 13. The result is 61. What is the number?
  7. 7.Arjun thinks of a number, multiplies it by 9 and then adds 26. The result is 143. What is the number?
  8. 8.Kavya thinks of a number, multiplies it by 4 and then adds 18. The result is 26. What is the number?
  9. 9.Solve: t/5 + 6 = 7. What is t?
  10. 10.Solve: 5p − 4 = 61. What is p?
  11. 11.Solve: 9n + 22 = 58. What is n?
  12. 12.Solve: 2(t + 9) = 20. What is t?
  13. 13.Rahul thinks of a number, multiplies it by 7 and then adds 26. The result is 131. What is the number?
  14. 14.Joseph’s mother is twice as old as Joseph. Their ages add up to 42 years. How old is Joseph?
  15. 15.Solve: 2p + 6 = 16. What is p?
  16. 16.Solve: 2n + 15 = 31. What is n?
  17. 17.Solve: 8p − 39 = 33. What is p?
  18. 18.Solve: 7n + 4 = 32. What is n?
  19. 19.Solve: 9(y + 2) = 126. What is y?
  20. 20.Tara’s mother is four times as old as Tara. Their ages add up to 30 years. How old is Tara?
  21. 21.Solve: 2p − 1 = 1. What is p?
  22. 22.Solve: 8n + 2 = 26. What is n?
  23. 23.Solve: 8(x + 3) = 64. What is x?
  24. 24.Solve: p/2 + 10 = 16. What is p?
  25. 25.Farhan’s mother is four times as old as Farhan. Their ages add up to 25 years. How old is Farhan?
  26. 26.Kabir thinks of a number, multiplies it by 7 and then adds 29. The result is 106. What is the number?
  27. 27.Kavya is 7 years older than a cousin. Their ages add up to 37 years. How old is the cousin?
  28. 28.Solve: 6n − 26 = 34. What is n?
  29. 29.Kabir is 5 years older than a cousin. Their ages add up to 15 years. How old is the cousin?
  30. 30.Solve: 2m + 6 = 8. What is m?
  31. 31.Solve: 5x + 16 = 51. What is x?
  32. 32.Solve: 9m + 23 = 86. What is m?
  33. 33.Solve: 2t − 6 = 2. What is t?
  34. 34.Kabir is 8 years older than a cousin. Their ages add up to 30 years. How old is the cousin?
  35. 35.Solve: x/7 + 5 = 9. What is x?
  36. 36.Solve: 3x + 18 = 48. What is x?
  37. 37.Kabir’s mother is four times as old as Kabir. Their ages add up to 70 years. How old is Kabir?
  38. 38.Solve: 6(t + 4) = 54. What is t?
  39. 39.Solve: m/5 + 18 = 23. What is m?
  40. 40.Arjun is 6 years older than a cousin. Their ages add up to 22 years. How old is the cousin?

Answer key

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

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