← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 456 · 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(y + 5) = 36. What is y?
  2. 2.Solve: 6x + 8 = 26. What is x?
  3. 3.Solve: 9n − 2 = 34. What is n?
  4. 4.Pooja thinks of a number, multiplies it by 6 and then adds 5. The result is 65. What is the number?
  5. 5.Solve: 2x + 3 = 7. What is x?
  6. 6.Saanvi is 3 years older than a cousin. Their ages add up to 25 years. How old is the cousin?
  7. 7.Solve: 5y + 14 = 64. What is y?
  8. 8.Solve: 4m − 3 = 17. What is m?
  9. 9.Solve: 7p + 28 = 56. What is p?
  10. 10.Diya thinks of a number, multiplies it by 2 and then adds 5. The result is 15. What is the number?
  11. 11.Solve: p/8 + 1 = 2. What is p?
  12. 12.Ishaan thinks of a number, multiplies it by 2 and then adds 22. The result is 46. What is the number?
  13. 13.Solve: y/6 + 11 = 15. What is y?
  14. 14.Solve: 7x − 3 = 4. What is x?
  15. 15.Solve: m/4 + 7 = 10. What is m?
  16. 16.Solve: p/6 + 12 = 26. What is p?
  17. 17.Solve: 7n − 3 = 11. What is n?
  18. 18.Solve: m/4 + 18 = 28. What is m?
  19. 19.Solve: 6(y + 4) = 114. What is y?
  20. 20.Solve: 5p − 28 = 12. What is p?
  21. 21.Solve: 6p + 15 = 39. What is p?
  22. 22.Solve: 8x − 12 = 12. What is x?
  23. 23.Solve: 9y − 100 = 26. What is y?
  24. 24.Solve: 2p − 1 = 1. What is p?
  25. 25.Solve: 5t + 9 = 54. What is t?
  26. 26.Solve: 4y − 2 = 2. What is y?
  27. 27.Solve: n/3 + 7 = 10. What is n?
  28. 28.Solve: m/5 + 15 = 16. What is m?
  29. 29.Solve: m/9 + 12 = 17. What is m?
  30. 30.Solve: m/6 + 12 = 21. What is m?
  31. 31.Solve: 8(x + 2) = 64. What is x?
  32. 32.Solve: n/6 + 8 = 12. What is n?
  33. 33.Solve: 2x + 18 = 46. What is x?
  34. 34.Solve: 3n − 26 = 7. What is n?
  35. 35.Joseph thinks of a number, multiplies it by 7 and then adds 21. The result is 42. What is the number?
  36. 36.Solve: x/4 + 9 = 24. What is x?
  37. 37.Kavya is 7 years older than a cousin. Their ages add up to 19 years. How old is the cousin?
  38. 38.Solve: 6x + 11 = 23. What is x?
  39. 39.Solve: m/9 + 19 = 33. What is m?
  40. 40.Karan is 5 years older than a cousin. Their ages add up to 23 years. How old is the cousin?

Answer key

  1. 13
  2. 3
  3. 4
  4. 10
  5. 2
  6. 11
  7. 10
  8. 5
  9. 4
  10. 5
  11. 8
  12. 12
  13. 24
  14. 1
  15. 12
  16. 84
  17. 2
  18. 40
  19. 15
  20. 8
  21. 4
  22. 3
  23. 14
  24. 1
  25. 9
  26. 1
  27. 9
  28. 5
  29. 45
  30. 54
  31. 6
  32. 24
  33. 14
  34. 11
  35. 3
  36. 60
  37. 6
  38. 2
  39. 126
  40. 9

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