← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 581 · 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.Gurpreet thinks of a number, multiplies it by 3 and then adds 23. The result is 44. What is the number?
  2. 2.Kavya is 5 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  3. 3.Solve: x/6 + 19 = 32. What is x?
  4. 4.Solve: 2(p + 2) = 6. What is p?
  5. 5.Solve: t/9 + 1 = 12. What is t?
  6. 6.Solve: 4(n + 7) = 76. What is n?
  7. 7.Solve: 3(y + 8) = 42. What is y?
  8. 8.Solve: 2(n + 5) = 14. What is n?
  9. 9.Ananya is 1 years older than a cousin. Their ages add up to 31 years. How old is the cousin?
  10. 10.Solve: 5m + 29 = 84. What is m?
  11. 11.Solve: t/3 + 8 = 10. What is t?
  12. 12.Solve: 3(y + 7) = 39. What is y?
  13. 13.Kabir is 5 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  14. 14.Solve: 9m + 22 = 130. What is m?
  15. 15.Sneha’s mother is three times as old as Sneha. Their ages add up to 16 years. How old is Sneha?
  16. 16.Farhan thinks of a number, multiplies it by 2 and then adds 5. The result is 9. What is the number?
  17. 17.Solve: 4y − 13 = 35. What is y?
  18. 18.Solve: 2p + 11 = 33. What is p?
  19. 19.Kabir thinks of a number, multiplies it by 8 and then adds 16. The result is 72. What is the number?
  20. 20.Solve: t/9 + 15 = 26. What is t?
  21. 21.Solve: t/2 + 10 = 16. What is t?
  22. 22.Solve: 7t − 11 = 73. What is t?
  23. 23.Diya thinks of a number, multiplies it by 5 and then adds 24. The result is 29. What is the number?
  24. 24.Solve: m/6 + 18 = 30. What is m?
  25. 25.Zoya’s mother is twice as old as Zoya. Their ages add up to 21 years. How old is Zoya?
  26. 26.Pooja’s mother is three times as old as Pooja. Their ages add up to 36 years. How old is Pooja?
  27. 27.Isha thinks of a number, multiplies it by 6 and then adds 29. The result is 77. What is the number?
  28. 28.Solve: 2t − 15 = 11. What is t?
  29. 29.Solve: 3(x + 5) = 18. What is x?
  30. 30.Solve: 8m − 15 = 1. What is m?
  31. 31.Solve: 5t + 26 = 101. What is t?
  32. 32.Solve: m/2 + 4 = 11. What is m?
  33. 33.Solve: 6x + 19 = 109. What is x?
  34. 34.Tara thinks of a number, multiplies it by 5 and then adds 20. The result is 65. What is the number?
  35. 35.Solve: 4(m + 6) = 56. What is m?
  36. 36.Solve: 2y − 1 = 1. What is y?
  37. 37.Solve: 6y + 6 = 12. What is y?
  38. 38.Solve: 8(m + 3) = 112. What is m?
  39. 39.Solve: 5t − 13 = 52. What is t?
  40. 40.Priya is 4 years older than a cousin. Their ages add up to 14 years. How old is the cousin?

Answer key

  1. 7
  2. 11
  3. 78
  4. 1
  5. 99
  6. 12
  7. 6
  8. 2
  9. 15
  10. 11
  11. 6
  12. 6
  13. 6
  14. 12
  15. 4
  16. 2
  17. 12
  18. 11
  19. 7
  20. 99
  21. 12
  22. 12
  23. 1
  24. 72
  25. 7
  26. 9
  27. 8
  28. 13
  29. 1
  30. 2
  31. 15
  32. 14
  33. 15
  34. 9
  35. 8
  36. 1
  37. 1
  38. 11
  39. 13
  40. 5

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