← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 850 · 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: 3p + 9 = 18. What is p?
  2. 2.Solve: x/2 + 13 = 23. What is x?
  3. 3.Solve: 3(n + 6) = 63. What is n?
  4. 4.Solve: 3y − 3 = 3. What is y?
  5. 5.Solve: m/4 + 6 = 20. What is m?
  6. 6.Dev thinks of a number, multiplies it by 3 and then adds 28. The result is 70. What is the number?
  7. 7.Priya’s mother is three times as old as Priya. Their ages add up to 28 years. How old is Priya?
  8. 8.Joseph thinks of a number, multiplies it by 8 and then adds 22. The result is 70. What is the number?
  9. 9.Solve: 8(y + 9) = 96. What is y?
  10. 10.Solve: t/8 + 4 = 7. What is t?
  11. 11.Joseph’s mother is four times as old as Joseph. Their ages add up to 60 years. How old is Joseph?
  12. 12.Ishaan is 5 years older than a cousin. Their ages add up to 35 years. How old is the cousin?
  13. 13.Solve: 8t + 1 = 81. What is t?
  14. 14.Solve: 5(p + 6) = 45. What is p?
  15. 15.Solve: 6t + 11 = 101. What is t?
  16. 16.Solve: 2n + 5 = 19. What is n?
  17. 17.Solve: p/3 + 15 = 19. What is p?
  18. 18.Solve: 4m + 13 = 53. What is m?
  19. 19.Solve: 3m + 23 = 26. What is m?
  20. 20.Aditya is 6 years older than a cousin. Their ages add up to 34 years. How old is the cousin?
  21. 21.Solve: 4t − 11 = 21. What is t?
  22. 22.Farhan thinks of a number, multiplies it by 5 and then adds 11. The result is 36. What is the number?
  23. 23.Solve: m/9 + 18 = 23. What is m?
  24. 24.Nisha’s mother is three times as old as Nisha. Their ages add up to 16 years. How old is Nisha?
  25. 25.Solve: 6m − 4 = 32. What is m?
  26. 26.Solve: 3n + 21 = 48. What is n?
  27. 27.Solve: 9t + 7 = 52. What is t?
  28. 28.Solve: 3(y + 1) = 30. What is y?
  29. 29.Solve: 7m − 3 = 11. What is m?
  30. 30.Solve: x/6 + 2 = 9. What is x?
  31. 31.Vivaan thinks of a number, multiplies it by 9 and then adds 4. The result is 76. What is the number?
  32. 32.Solve: 4t + 22 = 82. What is t?
  33. 33.Rohan’s mother is twice as old as Rohan. Their ages add up to 36 years. How old is Rohan?
  34. 34.Solve: n/9 + 14 = 19. What is n?
  35. 35.Solve: 3n + 21 = 51. What is n?
  36. 36.Solve: 8(x + 8) = 136. What is x?
  37. 37.Solve: 8(n + 5) = 136. What is n?
  38. 38.Solve: p/4 + 12 = 19. What is p?
  39. 39.Solve: m/5 + 8 = 23. What is m?
  40. 40.Karan is 2 years older than a cousin. Their ages add up to 14 years. How old is the cousin?

Answer key

  1. 3
  2. 20
  3. 15
  4. 2
  5. 56
  6. 14
  7. 7
  8. 6
  9. 3
  10. 24
  11. 12
  12. 15
  13. 10
  14. 3
  15. 15
  16. 7
  17. 12
  18. 10
  19. 1
  20. 14
  21. 8
  22. 5
  23. 45
  24. 4
  25. 6
  26. 9
  27. 5
  28. 9
  29. 2
  30. 42
  31. 8
  32. 15
  33. 12
  34. 45
  35. 10
  36. 9
  37. 12
  38. 28
  39. 75
  40. 6

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