← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 550 · 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: 6t + 20 = 104. What is t?
  2. 2.Meera thinks of a number, multiplies it by 9 and then adds 21. The result is 147. What is the number?
  3. 3.Solve: p/3 + 17 = 28. What is p?
  4. 4.Rohan is 2 years older than a cousin. Their ages add up to 32 years. How old is the cousin?
  5. 5.Riya thinks of a number, multiplies it by 6 and then adds 2. The result is 20. What is the number?
  6. 6.Solve: 3(m + 7) = 54. What is m?
  7. 7.Solve: 3x + 2 = 14. What is x?
  8. 8.Solve: 2(x + 9) = 44. What is x?
  9. 9.Kabir thinks of a number, multiplies it by 8 and then adds 29. The result is 109. What is the number?
  10. 10.Karan thinks of a number, multiplies it by 2 and then adds 2. The result is 24. What is the number?
  11. 11.Rohan’s mother is twice as old as Rohan. Their ages add up to 36 years. How old is Rohan?
  12. 12.Solve: 2(m + 1) = 28. What is m?
  13. 13.Solve: t/5 + 8 = 14. What is t?
  14. 14.Solve: 2(n + 5) = 38. What is n?
  15. 15.Diya thinks of a number, multiplies it by 7 and then adds 5. The result is 82. What is the number?
  16. 16.Solve: 4t + 26 = 62. What is t?
  17. 17.Solve: 7m − 2 = 61. What is m?
  18. 18.Solve: 3x + 24 = 27. What is x?
  19. 19.Solve: 3y − 1 = 2. What is y?
  20. 20.Rahul is 2 years older than a cousin. Their ages add up to 22 years. How old is the cousin?
  21. 21.Solve: y/4 + 19 = 33. What is y?
  22. 22.Solve: x/8 + 16 = 17. What is x?
  23. 23.Arjun thinks of a number, multiplies it by 9 and then adds 11. The result is 29. What is the number?
  24. 24.Solve: y/2 + 1 = 15. What is y?
  25. 25.Solve: 3p − 1 = 14. What is p?
  26. 26.Dev’s mother is three times as old as Dev. Their ages add up to 48 years. How old is Dev?
  27. 27.Zoya thinks of a number, multiplies it by 3 and then adds 8. The result is 44. What is the number?
  28. 28.Priya thinks of a number, multiplies it by 2 and then adds 30. The result is 44. What is the number?
  29. 29.Solve: x/4 + 12 = 16. What is x?
  30. 30.Solve: 7y + 10 = 24. What is y?
  31. 31.Priya’s mother is three times as old as Priya. Their ages add up to 20 years. How old is Priya?
  32. 32.Tara thinks of a number, multiplies it by 3 and then adds 27. The result is 39. What is the number?
  33. 33.Sneha thinks of a number, multiplies it by 2 and then adds 14. The result is 24. What is the number?
  34. 34.Saanvi thinks of a number, multiplies it by 6 and then adds 27. The result is 87. What is the number?
  35. 35.Nisha thinks of a number, multiplies it by 6 and then adds 7. The result is 13. What is the number?
  36. 36.Solve: 2y + 20 = 42. What is y?
  37. 37.Solve: 3x − 10 = 14. What is x?
  38. 38.Solve: 8(m + 2) = 56. What is m?
  39. 39.Diya is 1 years older than a cousin. Their ages add up to 13 years. How old is the cousin?
  40. 40.Solve: 4m + 11 = 43. What is m?

Answer key

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

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