← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 489 · 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: 5y − 35 = 5. What is y?
  2. 2.Solve: 7(y + 5) = 42. What is y?
  3. 3.Zoya’s mother is three times as old as Zoya. Their ages add up to 56 years. How old is Zoya?
  4. 4.Solve: 7x − 3 = 18. What is x?
  5. 5.Solve: 2(n + 9) = 38. What is n?
  6. 6.Solve: 5y − 2 = 3. What is y?
  7. 7.Solve: 3x + 20 = 53. What is x?
  8. 8.Solve: 2(n + 3) = 28. What is n?
  9. 9.Solve: 6p − 40 = 38. What is p?
  10. 10.Rohan thinks of a number, multiplies it by 6 and then adds 3. The result is 9. What is the number?
  11. 11.Solve: 2t − 1 = 11. What is t?
  12. 12.Joseph thinks of a number, multiplies it by 3 and then adds 20. The result is 50. What is the number?
  13. 13.Solve: 9t + 24 = 69. What is t?
  14. 14.Solve: 2(m + 8) = 36. What is m?
  15. 15.Pooja is 8 years older than a cousin. Their ages add up to 30 years. How old is the cousin?
  16. 16.Solve: 2t − 1 = 5. What is t?
  17. 17.Solve: t/9 + 6 = 7. What is t?
  18. 18.Tara’s mother is twice as old as Tara. Their ages add up to 42 years. How old is Tara?
  19. 19.Isha’s mother is four times as old as Isha. Their ages add up to 60 years. How old is Isha?
  20. 20.Solve: 9(y + 3) = 36. What is y?
  21. 21.Solve: 7m − 57 = 34. What is m?
  22. 22.Solve: 2x − 14 = 8. What is x?
  23. 23.Solve: 3t + 12 = 42. What is t?
  24. 24.Solve: p/4 + 1 = 9. What is p?
  25. 25.Priya thinks of a number, multiplies it by 9 and then adds 17. The result is 134. What is the number?
  26. 26.Solve: 3t − 30 = 3. What is t?
  27. 27.Ananya thinks of a number, multiplies it by 7 and then adds 4. The result is 109. What is the number?
  28. 28.Solve: 8t + 25 = 81. What is t?
  29. 29.Sneha thinks of a number, multiplies it by 3 and then adds 9. The result is 51. What is the number?
  30. 30.Nisha thinks of a number, multiplies it by 5 and then adds 21. The result is 81. What is the number?
  31. 31.Solve: 4y − 15 = 9. What is y?
  32. 32.Solve: 9n − 4 = 14. What is n?
  33. 33.Solve: 7(n + 4) = 35. What is n?
  34. 34.Solve: 9y + 14 = 50. What is y?
  35. 35.Solve: m/2 + 11 = 25. What is m?
  36. 36.Joseph is 5 years older than a cousin. Their ages add up to 29 years. How old is the cousin?
  37. 37.Rahul thinks of a number, multiplies it by 3 and then adds 3. The result is 6. What is the number?
  38. 38.Solve: t/8 + 7 = 10. What is t?
  39. 39.Kabir thinks of a number, multiplies it by 6 and then adds 2. The result is 32. What is the number?
  40. 40.Tara’s mother is three times as old as Tara. Their ages add up to 24 years. How old is Tara?

Answer key

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

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