← Simple equations lesson New set →

Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 347 · 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/3 + 7 = 13. What is x?
  2. 2.Nisha is 7 years older than a cousin. Their ages add up to 15 years. How old is the cousin?
  3. 3.Solve: 9(p + 2) = 90. What is p?
  4. 4.Solve: 2y + 4 = 18. What is y?
  5. 5.Solve: 6(m + 2) = 24. What is m?
  6. 6.Solve: 6n − 5 = 67. What is n?
  7. 7.Aarav thinks of a number, multiplies it by 4 and then adds 3. The result is 31. What is the number?
  8. 8.Solve: 7(m + 4) = 98. What is m?
  9. 9.Solve: 2(p + 8) = 30. What is p?
  10. 10.Solve: 6n − 1 = 29. What is n?
  11. 11.Priya thinks of a number, multiplies it by 4 and then adds 26. The result is 74. What is the number?
  12. 12.Solve: 5n − 14 = 61. What is n?
  13. 13.Solve: 8y + 3 = 11. What is y?
  14. 14.Solve: 2(p + 1) = 8. What is p?
  15. 15.Tara thinks of a number, multiplies it by 2 and then adds 29. The result is 45. What is the number?
  16. 16.Solve: 3y − 13 = 26. What is y?
  17. 17.Solve: y/2 + 1 = 9. What is y?
  18. 18.Solve: 3n − 4 = 29. What is n?
  19. 19.Solve: 2(t + 6) = 32. What is t?
  20. 20.Solve: 2y + 13 = 41. What is y?
  21. 21.Aarav is 5 years older than a cousin. Their ages add up to 33 years. How old is the cousin?
  22. 22.Isha thinks of a number, multiplies it by 4 and then adds 2. The result is 54. What is the number?
  23. 23.Solve: x/3 + 5 = 9. What is x?
  24. 24.Isha thinks of a number, multiplies it by 2 and then adds 12. The result is 16. What is the number?
  25. 25.Solve: 8p − 4 = 20. What is p?
  26. 26.Solve: p/9 + 8 = 12. What is p?
  27. 27.Priya thinks of a number, multiplies it by 7 and then adds 14. The result is 119. What is the number?
  28. 28.Solve: x/9 + 15 = 16. What is x?
  29. 29.Solve: 7t + 6 = 20. What is t?
  30. 30.Solve: 5x + 11 = 61. What is x?
  31. 31.Solve: t/7 + 6 = 9. What is t?
  32. 32.Solve: 4t − 46 = 10. What is t?
  33. 33.Solve: 3n − 4 = 5. What is n?
  34. 34.Pooja thinks of a number, multiplies it by 4 and then adds 17. The result is 77. What is the number?
  35. 35.Solve: 2y + 12 = 32. What is y?
  36. 36.Solve: t/3 + 9 = 15. What is t?
  37. 37.Solve: 7x + 17 = 94. What is x?
  38. 38.Solve: 5(t + 3) = 30. What is t?
  39. 39.Solve: t/9 + 12 = 22. What is t?
  40. 40.Solve: 3m − 25 = 5. What is m?

Answer key

  1. 18
  2. 4
  3. 8
  4. 7
  5. 2
  6. 12
  7. 7
  8. 10
  9. 7
  10. 5
  11. 12
  12. 15
  13. 1
  14. 3
  15. 8
  16. 13
  17. 16
  18. 11
  19. 10
  20. 14
  21. 14
  22. 13
  23. 12
  24. 2
  25. 3
  26. 36
  27. 15
  28. 9
  29. 2
  30. 10
  31. 21
  32. 14
  33. 3
  34. 15
  35. 10
  36. 18
  37. 11
  38. 3
  39. 90
  40. 10

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