← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 592 · 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: 9y − 61 = 2. What is y?
  2. 2.Solve: 9x + 16 = 151. What is x?
  3. 3.Solve: 8(y + 7) = 104. What is y?
  4. 4.Solve: p/9 + 3 = 15. What is p?
  5. 5.Priya thinks of a number, multiplies it by 2 and then adds 30. The result is 42. What is the number?
  6. 6.Solve: 4(t + 6) = 48. What is t?
  7. 7.Solve: 2m − 6 = 16. What is m?
  8. 8.Solve: 4(n + 3) = 32. What is n?
  9. 9.Solve: 7t + 13 = 104. What is t?
  10. 10.Solve: n/2 + 5 = 11. What is n?
  11. 11.Solve: 8x + 25 = 113. What is x?
  12. 12.Solve: 6p − 3 = 9. What is p?
  13. 13.Solve: 5(y + 9) = 60. What is y?
  14. 14.Solve: 4y + 1 = 61. What is y?
  15. 15.Manav thinks of a number, multiplies it by 4 and then adds 16. The result is 72. What is the number?
  16. 16.Solve: 6x + 7 = 67. What is x?
  17. 17.Solve: 3(n + 2) = 39. What is n?
  18. 18.Solve: 6p + 6 = 18. What is p?
  19. 19.Solve: 9y − 7 = 2. What is y?
  20. 20.Solve: 3(t + 5) = 36. What is t?
  21. 21.Solve: 8(m + 6) = 128. What is m?
  22. 22.Ishaan is 6 years older than a cousin. Their ages add up to 16 years. How old is the cousin?
  23. 23.Solve: 6(n + 5) = 60. What is n?
  24. 24.Dev thinks of a number, multiplies it by 8 and then adds 27. The result is 107. What is the number?
  25. 25.Solve: 7p + 9 = 72. What is p?
  26. 26.Rohan thinks of a number, multiplies it by 8 and then adds 16. The result is 112. What is the number?
  27. 27.Solve: 7t − 4 = 3. What is t?
  28. 28.Solve: 6(t + 8) = 108. What is t?
  29. 29.Solve: 4t + 1 = 29. What is t?
  30. 30.Solve: 9p − 16 = 110. What is p?
  31. 31.Ishaan’s mother is three times as old as Ishaan. Their ages add up to 40 years. How old is Ishaan?
  32. 32.Solve: 9(x + 8) = 108. What is x?
  33. 33.Gurpreet is 3 years older than a cousin. Their ages add up to 25 years. How old is the cousin?
  34. 34.Sneha thinks of a number, multiplies it by 4 and then adds 22. The result is 82. What is the number?
  35. 35.Karan is 5 years older than a cousin. Their ages add up to 35 years. How old is the cousin?
  36. 36.Solve: n/8 + 1 = 6. What is n?
  37. 37.Solve: 2t + 5 = 27. What is t?
  38. 38.Manav is 1 years older than a cousin. Their ages add up to 21 years. How old is the cousin?
  39. 39.Solve: 9m − 39 = 15. What is m?
  40. 40.Manav is 5 years older than a cousin. Their ages add up to 19 years. How old is the cousin?

Answer key

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

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