← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 163 · 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: 2(p + 1) = 12. What is p?
  2. 2.Solve: 9t + 22 = 31. What is t?
  3. 3.Solve: 8(y + 4) = 40. What is y?
  4. 4.Karan thinks of a number, multiplies it by 6 and then adds 15. The result is 45. What is the number?
  5. 5.Solve: 3t + 18 = 27. What is t?
  6. 6.Gurpreet is 4 years older than a cousin. Their ages add up to 32 years. How old is the cousin?
  7. 7.Solve: 8t − 19 = 77. What is t?
  8. 8.Kavya is 8 years older than a cousin. Their ages add up to 22 years. How old is the cousin?
  9. 9.Solve: 7m + 27 = 69. What is m?
  10. 10.Solve: 7x − 62 = 8. What is x?
  11. 11.Pooja thinks of a number, multiplies it by 9 and then adds 1. The result is 136. What is the number?
  12. 12.Solve: 9p + 19 = 145. What is p?
  13. 13.Solve: y/7 + 5 = 8. What is y?
  14. 14.Solve: 8n + 9 = 41. What is n?
  15. 15.Solve: 8(t + 9) = 96. What is t?
  16. 16.Solve: 4y − 5 = 11. What is y?
  17. 17.Solve: 2x + 27 = 55. What is x?
  18. 18.Solve: 2n − 6 = 16. What is n?
  19. 19.Solve: 6y − 14 = 28. What is y?
  20. 20.Farhan thinks of a number, multiplies it by 3 and then adds 18. The result is 24. What is the number?
  21. 21.Solve: 2(y + 2) = 24. What is y?
  22. 22.Joseph thinks of a number, multiplies it by 9 and then adds 13. The result is 67. What is the number?
  23. 23.Solve: 2y − 7 = 17. What is y?
  24. 24.Solve: p/4 + 7 = 21. What is p?
  25. 25.Solve: 7x + 3 = 66. What is x?
  26. 26.Zoya thinks of a number, multiplies it by 3 and then adds 16. The result is 49. What is the number?
  27. 27.Solve: 7(p + 2) = 91. What is p?
  28. 28.Solve: 4(n + 7) = 40. What is n?
  29. 29.Solve: 2t − 1 = 1. What is t?
  30. 30.Solve: n/3 + 7 = 13. What is n?
  31. 31.Solve: 2(p + 8) = 24. What is p?
  32. 32.Solve: 4p + 11 = 43. What is p?
  33. 33.Solve: p/8 + 2 = 11. What is p?
  34. 34.Rohan’s mother is twice as old as Rohan. Their ages add up to 36 years. How old is Rohan?
  35. 35.Solve: 8(n + 5) = 80. What is n?
  36. 36.Solve: 3p − 23 = 7. What is p?
  37. 37.Solve: 9x + 12 = 138. What is x?
  38. 38.Solve: 5y − 33 = 7. What is y?
  39. 39.Solve: p/4 + 2 = 3. What is p?
  40. 40.Solve: 6p + 24 = 96. What is p?

Answer key

  1. 5
  2. 1
  3. 1
  4. 5
  5. 3
  6. 14
  7. 12
  8. 7
  9. 6
  10. 10
  11. 15
  12. 14
  13. 21
  14. 4
  15. 3
  16. 4
  17. 14
  18. 11
  19. 7
  20. 2
  21. 10
  22. 6
  23. 12
  24. 56
  25. 9
  26. 11
  27. 11
  28. 3
  29. 1
  30. 18
  31. 4
  32. 8
  33. 72
  34. 12
  35. 5
  36. 10
  37. 14
  38. 8
  39. 4
  40. 12

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