← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 889 · 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: 6m + 2 = 86. What is m?
  2. 2.Solve: 4y + 2 = 54. What is y?
  3. 3.Solve: 2(m + 7) = 38. What is m?
  4. 4.Solve: 5x − 4 = 11. What is x?
  5. 5.Meera thinks of a number, multiplies it by 6 and then adds 19. The result is 91. What is the number?
  6. 6.Solve: 5(x + 9) = 50. What is x?
  7. 7.Solve: 2(m + 9) = 36. What is m?
  8. 8.Solve: n/2 + 6 = 15. What is n?
  9. 9.Solve: p/9 + 6 = 18. What is p?
  10. 10.Solve: 2(m + 3) = 16. What is m?
  11. 11.Priya is 2 years older than a cousin. Their ages add up to 20 years. How old is the cousin?
  12. 12.Priya thinks of a number, multiplies it by 8 and then adds 14. The result is 54. What is the number?
  13. 13.Tara is 4 years older than a cousin. Their ages add up to 18 years. How old is the cousin?
  14. 14.Solve: x/9 + 12 = 13. What is x?
  15. 15.Manav thinks of a number, multiplies it by 2 and then adds 9. The result is 31. What is the number?
  16. 16.Solve: 9(n + 1) = 27. What is n?
  17. 17.Manav thinks of a number, multiplies it by 5 and then adds 26. The result is 86. What is the number?
  18. 18.Ananya thinks of a number, multiplies it by 4 and then adds 10. The result is 42. What is the number?
  19. 19.Pooja is 3 years older than a cousin. Their ages add up to 29 years. How old is the cousin?
  20. 20.Solve: y/9 + 5 = 13. What is y?
  21. 21.Solve: m/2 + 20 = 32. What is m?
  22. 22.Solve: 4x + 1 = 37. What is x?
  23. 23.Solve: 9p + 21 = 66. What is p?
  24. 24.Solve: 9(n + 5) = 54. What is n?
  25. 25.Karan’s mother is twice as old as Karan. Their ages add up to 42 years. How old is Karan?
  26. 26.Solve: 7(n + 6) = 147. What is n?
  27. 27.Rohan’s mother is three times as old as Rohan. Their ages add up to 48 years. How old is Rohan?
  28. 28.Solve: 9y − 54 = 9. What is y?
  29. 29.Solve: 2y + 8 = 18. What is y?
  30. 30.Solve: 5y − 17 = 38. What is y?
  31. 31.Isha is 3 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  32. 32.Gurpreet’s mother is four times as old as Gurpreet. Their ages add up to 35 years. How old is Gurpreet?
  33. 33.Meera thinks of a number, multiplies it by 4 and then adds 19. The result is 27. What is the number?
  34. 34.Solve: 3x + 7 = 13. What is x?
  35. 35.Solve: 8p + 28 = 140. What is p?
  36. 36.Isha’s mother is twice as old as Isha. Their ages add up to 42 years. How old is Isha?
  37. 37.Solve: x/4 + 6 = 7. What is x?
  38. 38.Solve: x/4 + 17 = 27. What is x?
  39. 39.Solve: 4y − 2 = 2. What is y?
  40. 40.Solve: 9m + 12 = 93. What is m?

Answer key

  1. 14
  2. 13
  3. 12
  4. 3
  5. 12
  6. 1
  7. 9
  8. 18
  9. 108
  10. 5
  11. 9
  12. 5
  13. 7
  14. 9
  15. 11
  16. 2
  17. 12
  18. 8
  19. 13
  20. 72
  21. 24
  22. 9
  23. 5
  24. 1
  25. 14
  26. 15
  27. 12
  28. 7
  29. 5
  30. 11
  31. 10
  32. 7
  33. 2
  34. 2
  35. 14
  36. 14
  37. 4
  38. 40
  39. 1
  40. 9

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