← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 16 · 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: 3(x + 3) = 42. What is x?
  2. 2.Solve: 9p + 19 = 127. What is p?
  3. 3.Solve: 5m + 9 = 49. What is m?
  4. 4.Solve: 6x − 4 = 8. What is x?
  5. 5.Pooja’s mother is twice as old as Pooja. Their ages add up to 33 years. How old is Pooja?
  6. 6.Sneha is 8 years older than a cousin. Their ages add up to 28 years. How old is the cousin?
  7. 7.Karan’s mother is four times as old as Karan. Their ages add up to 55 years. How old is Karan?
  8. 8.Zoya is 6 years older than a cousin. Their ages add up to 30 years. How old is the cousin?
  9. 9.Aditya thinks of a number, multiplies it by 4 and then adds 12. The result is 36. What is the number?
  10. 10.Solve: 3x − 22 = 11. What is x?
  11. 11.Solve: t/3 + 10 = 19. What is t?
  12. 12.Solve: 9p + 8 = 26. What is p?
  13. 13.Gurpreet thinks of a number, multiplies it by 9 and then adds 10. The result is 37. What is the number?
  14. 14.Solve: 9t + 22 = 58. What is t?
  15. 15.Rohan thinks of a number, multiplies it by 5 and then adds 15. The result is 50. What is the number?
  16. 16.Solve: x/5 + 5 = 15. What is x?
  17. 17.Meera is 5 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  18. 18.Solve: 2y + 28 = 34. What is y?
  19. 19.Solve: 9n + 22 = 49. What is n?
  20. 20.Solve: 8x − 34 = 22. What is x?
  21. 21.Solve: 2y + 14 = 44. What is y?
  22. 22.Solve: 4n − 11 = 25. What is n?
  23. 23.Gurpreet thinks of a number, multiplies it by 7 and then adds 22. The result is 57. What is the number?
  24. 24.Solve: 9(m + 7) = 180. What is m?
  25. 25.Saanvi’s mother is four times as old as Saanvi. Their ages add up to 70 years. How old is Saanvi?
  26. 26.Solve: 3y − 14 = 10. What is y?
  27. 27.Solve: 3p − 10 = 29. What is p?
  28. 28.Arjun thinks of a number, multiplies it by 3 and then adds 24. The result is 60. What is the number?
  29. 29.Solve: 8t + 1 = 97. What is t?
  30. 30.Gurpreet thinks of a number, multiplies it by 8 and then adds 24. The result is 88. What is the number?
  31. 31.Solve: 4y − 16 = 12. What is y?
  32. 32.Solve: 5(m + 7) = 50. What is m?
  33. 33.Solve: y/5 + 8 = 14. What is y?
  34. 34.Solve: m/5 + 15 = 30. What is m?
  35. 35.Solve: 7(m + 9) = 147. What is m?
  36. 36.Riya thinks of a number, multiplies it by 3 and then adds 28. The result is 64. What is the number?
  37. 37.Rahul thinks of a number, multiplies it by 6 and then adds 26. The result is 44. What is the number?
  38. 38.Solve: 8(t + 1) = 40. What is t?
  39. 39.Isha is 1 years older than a cousin. Their ages add up to 27 years. How old is the cousin?
  40. 40.Solve: 4y − 3 = 17. What is y?

Answer key

  1. 11
  2. 12
  3. 8
  4. 2
  5. 11
  6. 10
  7. 11
  8. 12
  9. 6
  10. 11
  11. 27
  12. 2
  13. 3
  14. 4
  15. 7
  16. 50
  17. 11
  18. 3
  19. 3
  20. 7
  21. 15
  22. 9
  23. 5
  24. 13
  25. 14
  26. 8
  27. 13
  28. 12
  29. 12
  30. 8
  31. 7
  32. 3
  33. 30
  34. 75
  35. 12
  36. 12
  37. 3
  38. 4
  39. 13
  40. 5

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