← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 954 · 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: x/8 + 12 = 26. What is x?
  2. 2.Meera is 4 years older than a cousin. Their ages add up to 14 years. How old is the cousin?
  3. 3.Joseph thinks of a number, multiplies it by 2 and then adds 26. The result is 36. What is the number?
  4. 4.Solve: 3t + 9 = 15. What is t?
  5. 5.Manav thinks of a number, multiplies it by 4 and then adds 28. The result is 32. What is the number?
  6. 6.Tara is 7 years older than a cousin. Their ages add up to 35 years. How old is the cousin?
  7. 7.Solve: 2(p + 3) = 30. What is p?
  8. 8.Solve: n/2 + 13 = 19. What is n?
  9. 9.Pooja thinks of a number, multiplies it by 4 and then adds 21. The result is 33. What is the number?
  10. 10.Solve: 8(n + 1) = 24. What is n?
  11. 11.Isha is 3 years older than a cousin. Their ages add up to 23 years. How old is the cousin?
  12. 12.Solve: 3x − 27 = 18. What is x?
  13. 13.Solve: m/8 + 15 = 25. What is m?
  14. 14.Solve: 8(y + 1) = 16. What is y?
  15. 15.Solve: 8y − 49 = 39. What is y?
  16. 16.Solve: p/3 + 10 = 11. What is p?
  17. 17.Farhan thinks of a number, multiplies it by 4 and then adds 15. The result is 23. What is the number?
  18. 18.Solve: 9p − 76 = 14. What is p?
  19. 19.Solve: 2p + 26 = 56. What is p?
  20. 20.Solve: 2n + 22 = 52. What is n?
  21. 21.Rahul thinks of a number, multiplies it by 2 and then adds 10. The result is 32. What is the number?
  22. 22.Solve: 7(y + 2) = 84. What is y?
  23. 23.Diya thinks of a number, multiplies it by 4 and then adds 2. The result is 30. What is the number?
  24. 24.Solve: 4(x + 9) = 48. What is x?
  25. 25.Solve: 6x − 19 = 71. What is x?
  26. 26.Solve: 7y − 45 = 18. What is y?
  27. 27.Kabir is 6 years older than a cousin. Their ages add up to 36 years. How old is the cousin?
  28. 28.Solve: y/6 + 5 = 6. What is y?
  29. 29.Riya thinks of a number, multiplies it by 7 and then adds 28. The result is 126. What is the number?
  30. 30.Solve: 9(m + 2) = 99. What is m?
  31. 31.Farhan thinks of a number, multiplies it by 2 and then adds 3. The result is 9. What is the number?
  32. 32.Solve: t/4 + 5 = 18. What is t?
  33. 33.Tara is 3 years older than a cousin. Their ages add up to 21 years. How old is the cousin?
  34. 34.Solve: 3p − 2 = 4. What is p?
  35. 35.Solve: 2(n + 4) = 22. What is n?
  36. 36.Arjun thinks of a number, multiplies it by 5 and then adds 15. The result is 55. What is the number?
  37. 37.Solve: 4(y + 2) = 12. What is y?
  38. 38.Solve: 6(m + 1) = 72. What is m?
  39. 39.Solve: 8m + 14 = 94. What is m?
  40. 40.Solve: 2p − 1 = 9. What is p?

Answer key

  1. 112
  2. 5
  3. 5
  4. 2
  5. 1
  6. 14
  7. 12
  8. 12
  9. 3
  10. 2
  11. 10
  12. 15
  13. 80
  14. 1
  15. 11
  16. 3
  17. 2
  18. 10
  19. 15
  20. 15
  21. 11
  22. 10
  23. 7
  24. 3
  25. 15
  26. 9
  27. 15
  28. 6
  29. 14
  30. 9
  31. 3
  32. 52
  33. 9
  34. 2
  35. 7
  36. 8
  37. 1
  38. 11
  39. 10
  40. 5

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