← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 246 · 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: 2m + 28 = 42. What is m?
  2. 2.Solve: p/2 + 16 = 27. What is p?
  3. 3.Solve: m/8 + 3 = 5. What is m?
  4. 4.Solve: n/9 + 11 = 15. What is n?
  5. 5.Solve: 2t − 6 = 2. What is t?
  6. 6.Solve: 6m + 20 = 44. What is m?
  7. 7.Kabir is 7 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  8. 8.Solve: p/9 + 18 = 26. What is p?
  9. 9.Solve: 2m + 6 = 8. What is m?
  10. 10.Priya thinks of a number, multiplies it by 3 and then adds 8. The result is 14. What is the number?
  11. 11.Solve: 5y − 2 = 3. What is y?
  12. 12.Solve: n/8 + 11 = 18. What is n?
  13. 13.Rahul is 8 years older than a cousin. Their ages add up to 22 years. How old is the cousin?
  14. 14.Solve: 2p + 9 = 17. What is p?
  15. 15.Solve: 4y − 36 = 20. What is y?
  16. 16.Solve: 8x − 6 = 26. What is x?
  17. 17.Solve: 5x − 43 = 17. What is x?
  18. 18.Solve: 6(m + 2) = 18. What is m?
  19. 19.Pooja is 2 years older than a cousin. Their ages add up to 12 years. How old is the cousin?
  20. 20.Solve: 5y − 10 = 15. What is y?
  21. 21.Solve: y/3 + 17 = 24. What is y?
  22. 22.Joseph’s mother is twice as old as Joseph. Their ages add up to 42 years. How old is Joseph?
  23. 23.Solve: y/4 + 17 = 19. What is y?
  24. 24.Aarav is 1 years older than a cousin. Their ages add up to 25 years. How old is the cousin?
  25. 25.Pooja thinks of a number, multiplies it by 5 and then adds 15. The result is 30. What is the number?
  26. 26.Meera is 8 years older than a cousin. Their ages add up to 38 years. How old is the cousin?
  27. 27.Solve: 4m − 1 = 3. What is m?
  28. 28.Priya thinks of a number, multiplies it by 2 and then adds 13. The result is 23. What is the number?
  29. 29.Solve: 4y − 13 = 7. What is y?
  30. 30.Solve: 5(n + 5) = 75. What is n?
  31. 31.Solve: m/7 + 4 = 6. What is m?
  32. 32.Solve: 2(m + 8) = 24. What is m?
  33. 33.Solve: 4y − 1 = 19. What is y?
  34. 34.Farhan thinks of a number, multiplies it by 4 and then adds 18. The result is 62. What is the number?
  35. 35.Solve: 9(t + 2) = 117. What is t?
  36. 36.Solve: 7t − 40 = 16. What is t?
  37. 37.Solve: 9n − 5 = 4. What is n?
  38. 38.Solve: p/2 + 10 = 23. What is p?
  39. 39.Solve: 3m − 5 = 1. What is m?
  40. 40.Solve: 3(n + 9) = 39. What is n?

Answer key

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

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