← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 883 · 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: 2n + 16 = 46. What is n?
  2. 2.Solve: 4(x + 6) = 84. What is x?
  3. 3.Manav’s mother is three times as old as Manav. Their ages add up to 16 years. How old is Manav?
  4. 4.Solve: m/2 + 9 = 17. What is m?
  5. 5.Solve: p/6 + 20 = 26. What is p?
  6. 6.Solve: 2y − 1 = 29. What is y?
  7. 7.Riya’s mother is twice as old as Riya. Their ages add up to 12 years. How old is Riya?
  8. 8.Karan is 1 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  9. 9.Solve: 2y + 8 = 14. What is y?
  10. 10.Solve: 9n − 99 = 18. What is n?
  11. 11.Solve: 3x + 11 = 50. What is x?
  12. 12.Solve: 9(t + 2) = 63. What is t?
  13. 13.Gurpreet thinks of a number, multiplies it by 3 and then adds 11. The result is 23. What is the number?
  14. 14.Solve: 4p − 11 = 9. What is p?
  15. 15.Solve: 8n + 5 = 101. What is n?
  16. 16.Solve: 8x − 93 = 11. What is x?
  17. 17.Solve: 3(y + 3) = 48. What is y?
  18. 18.Solve: p/2 + 4 = 11. What is p?
  19. 19.Rahul’s mother is three times as old as Rahul. Their ages add up to 60 years. How old is Rahul?
  20. 20.Solve: 4(y + 1) = 40. What is y?
  21. 21.Solve: 2p − 11 = 3. What is p?
  22. 22.Solve: p/4 + 7 = 9. What is p?
  23. 23.Arjun thinks of a number, multiplies it by 2 and then adds 15. The result is 41. What is the number?
  24. 24.Rohan thinks of a number, multiplies it by 5 and then adds 16. The result is 31. What is the number?
  25. 25.Sneha’s mother is twice as old as Sneha. Their ages add up to 18 years. How old is Sneha?
  26. 26.Pooja thinks of a number, multiplies it by 5 and then adds 2. The result is 27. What is the number?
  27. 27.Solve: 7(m + 5) = 140. What is m?
  28. 28.Solve: 6t − 8 = 16. What is t?
  29. 29.Isha thinks of a number, multiplies it by 8 and then adds 14. The result is 70. What is the number?
  30. 30.Solve: 9m − 38 = 97. What is m?
  31. 31.Solve: m/4 + 1 = 5. What is m?
  32. 32.Solve: 9(n + 2) = 27. What is n?
  33. 33.Solve: 3x + 25 = 40. What is x?
  34. 34.Solve: 7x − 2 = 5. What is x?
  35. 35.Solve: 3p + 2 = 11. What is p?
  36. 36.Ishaan is 8 years older than a cousin. Their ages add up to 20 years. How old is the cousin?
  37. 37.Solve: 4(x + 1) = 48. What is x?
  38. 38.Solve: 5t + 17 = 77. What is t?
  39. 39.Solve: 7t + 8 = 15. What is t?
  40. 40.Solve: 2x − 13 = 5. What is x?

Answer key

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

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