← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 901 · 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: 2p + 7 = 27. What is p?
  2. 2.Diya thinks of a number, multiplies it by 5 and then adds 18. The result is 93. What is the number?
  3. 3.Solve: 8y + 24 = 64. What is y?
  4. 4.Kavya thinks of a number, multiplies it by 2 and then adds 12. The result is 30. What is the number?
  5. 5.Solve: 6p + 8 = 80. What is p?
  6. 6.Solve: 4n − 6 = 2. What is n?
  7. 7.Solve: 3t + 29 = 56. What is t?
  8. 8.Solve: 2x + 3 = 17. What is x?
  9. 9.Pooja is 2 years older than a cousin. Their ages add up to 20 years. How old is the cousin?
  10. 10.Solve: 2m + 6 = 34. What is m?
  11. 11.Solve: 3p + 25 = 67. What is p?
  12. 12.Kavya is 5 years older than a cousin. Their ages add up to 13 years. How old is the cousin?
  13. 13.Nisha’s mother is four times as old as Nisha. Their ages add up to 25 years. How old is Nisha?
  14. 14.Solve: 6(m + 2) = 42. What is m?
  15. 15.Solve: 7y + 17 = 80. What is y?
  16. 16.Rohan thinks of a number, multiplies it by 9 and then adds 7. The result is 97. What is the number?
  17. 17.Solve: 5x − 34 = 6. What is x?
  18. 18.Solve: 3p − 1 = 2. What is p?
  19. 19.Sneha thinks of a number, multiplies it by 9 and then adds 5. The result is 14. What is the number?
  20. 20.Solve: p/3 + 13 = 21. What is p?
  21. 21.Ananya is 6 years older than a cousin. Their ages add up to 14 years. How old is the cousin?
  22. 22.Ishaan is 5 years older than a cousin. Their ages add up to 35 years. How old is the cousin?
  23. 23.Solve: 7x + 1 = 29. What is x?
  24. 24.Solve: 3(m + 1) = 45. What is m?
  25. 25.Solve: 7y + 3 = 101. What is y?
  26. 26.Kavya’s mother is four times as old as Kavya. Their ages add up to 75 years. How old is Kavya?
  27. 27.Meera thinks of a number, multiplies it by 4 and then adds 9. The result is 29. What is the number?
  28. 28.Solve: 5x + 12 = 22. What is x?
  29. 29.Solve: y/2 + 5 = 9. What is y?
  30. 30.Solve: 5y − 21 = 24. What is y?
  31. 31.Isha is 1 years older than a cousin. Their ages add up to 29 years. How old is the cousin?
  32. 32.Pooja thinks of a number, multiplies it by 3 and then adds 5. The result is 20. What is the number?
  33. 33.Solve: 2(t + 3) = 12. What is t?
  34. 34.Solve: 2(t + 3) = 34. What is t?
  35. 35.Solve: 6t − 51 = 33. What is t?
  36. 36.Solve: p/7 + 5 = 7. What is p?
  37. 37.Solve: 3m − 16 = 14. What is m?
  38. 38.Solve: x/9 + 18 = 26. What is x?
  39. 39.Gurpreet thinks of a number, multiplies it by 9 and then adds 11. The result is 65. What is the number?
  40. 40.Arjun’s mother is three times as old as Arjun. Their ages add up to 48 years. How old is Arjun?

Answer key

  1. 10
  2. 15
  3. 5
  4. 9
  5. 12
  6. 2
  7. 9
  8. 7
  9. 9
  10. 14
  11. 14
  12. 4
  13. 5
  14. 5
  15. 9
  16. 10
  17. 8
  18. 1
  19. 1
  20. 24
  21. 4
  22. 15
  23. 4
  24. 14
  25. 14
  26. 15
  27. 5
  28. 2
  29. 8
  30. 9
  31. 14
  32. 5
  33. 3
  34. 14
  35. 14
  36. 14
  37. 10
  38. 72
  39. 6
  40. 12

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