← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 740 · 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: 7n − 2 = 5. What is n?
  2. 2.Solve: 2m + 3 = 15. What is m?
  3. 3.Solve: 5(p + 9) = 90. What is p?
  4. 4.Solve: 2(t + 4) = 36. What is t?
  5. 5.Aditya’s mother is twice as old as Aditya. Their ages add up to 42 years. How old is Aditya?
  6. 6.Solve: 7y − 4 = 10. What is y?
  7. 7.Tara thinks of a number, multiplies it by 4 and then adds 28. The result is 84. What is the number?
  8. 8.Rahul’s mother is twice as old as Rahul. Their ages add up to 30 years. How old is Rahul?
  9. 9.Joseph thinks of a number, multiplies it by 3 and then adds 9. The result is 51. What is the number?
  10. 10.Kavya thinks of a number, multiplies it by 3 and then adds 23. The result is 32. What is the number?
  11. 11.Riya is 8 years older than a cousin. Their ages add up to 38 years. How old is the cousin?
  12. 12.Solve: 6n + 3 = 45. What is n?
  13. 13.Kabir is 2 years older than a cousin. Their ages add up to 32 years. How old is the cousin?
  14. 14.Isha’s mother is twice as old as Isha. Their ages add up to 33 years. How old is Isha?
  15. 15.Solve: 8p − 77 = 19. What is p?
  16. 16.Solve: 8n − 80 = 8. What is n?
  17. 17.Solve: 9m − 5 = 49. What is m?
  18. 18.Karan is 1 years older than a cousin. Their ages add up to 9 years. How old is the cousin?
  19. 19.Meera is 5 years older than a cousin. Their ages add up to 17 years. How old is the cousin?
  20. 20.Solve: 7x + 5 = 33. What is x?
  21. 21.Solve: 7(p + 5) = 42. What is p?
  22. 22.Solve: 3x + 29 = 44. What is x?
  23. 23.Solve: 7(t + 3) = 42. What is t?
  24. 24.Solve: 2t + 17 = 23. What is t?
  25. 25.Solve: 5(m + 5) = 100. What is m?
  26. 26.Solve: 2t − 8 = 2. What is t?
  27. 27.Solve: 6p + 22 = 40. What is p?
  28. 28.Aarav thinks of a number, multiplies it by 2 and then adds 28. The result is 36. What is the number?
  29. 29.Sneha thinks of a number, multiplies it by 9 and then adds 21. The result is 57. What is the number?
  30. 30.Solve: y/3 + 2 = 15. What is y?
  31. 31.Solve: 8x + 7 = 111. What is x?
  32. 32.Solve: x/2 + 3 = 8. What is x?
  33. 33.Solve: 2y − 3 = 3. What is y?
  34. 34.Isha’s mother is twice as old as Isha. Their ages add up to 36 years. How old is Isha?
  35. 35.Solve: 6(n + 8) = 78. What is n?
  36. 36.Gurpreet is 2 years older than a cousin. Their ages add up to 26 years. How old is the cousin?
  37. 37.Solve: n/3 + 3 = 4. What is n?
  38. 38.Solve: p/4 + 6 = 9. What is p?
  39. 39.Solve: m/2 + 15 = 27. What is m?
  40. 40.Kavya thinks of a number, multiplies it by 4 and then adds 9. The result is 33. What is the number?

Answer key

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

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