Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 384 · 40 sums

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.

1. 1.Solve: 7(p + 5) = 98. What is p?
2. 2.Solve: 6x + 15 = 81. What is x?
3. 3.Zoya thinks of a number, multiplies it by 5 and then adds 3. The result is 43. What is the number?
4. 4.Solve: 6x + 29 = 53. What is x?
5. 5.Solve: 9(t + 3) = 72. What is t?
6. 6.Farhan thinks of a number, multiplies it by 3 and then adds 25. The result is 52. What is the number?
7. 7.Rohan’s mother is four times as old as Rohan. Their ages add up to 55 years. How old is Rohan?
8. 8.Solve: 3m + 12 = 21. What is m?
9. 9.Ananya’s mother is twice as old as Ananya. Their ages add up to 12 years. How old is Ananya?
10. 10.Solve: 7y − 2 = 26. What is y?
11. 11.Solve: 6(m + 4) = 102. What is m?
12. 12.Solve: 8p − 12 = 36. What is p?
13. 13.Solve: 9y + 26 = 134. What is y?
14. 14.Solve: 4y − 5 = 11. What is y?
15. 15.Nisha thinks of a number, multiplies it by 7 and then adds 9. The result is 72. What is the number?
16. 16.Solve: 3(p + 3) = 12. What is p?
17. 17.Solve: x/8 + 11 = 14. What is x?
18. 18.Kabir thinks of a number, multiplies it by 4 and then adds 26. The result is 34. What is the number?
19. 19.Farhan thinks of a number, multiplies it by 4 and then adds 10. The result is 14. What is the number?
20. 20.Solve: 9(n + 9) = 171. What is n?
21. 21.Solve: 8m − 25 = 95. What is m?
22. 22.Riya’s mother is four times as old as Riya. Their ages add up to 20 years. How old is Riya?
23. 23.Solve: 7p + 21 = 119. What is p?
24. 24.Solve: x/3 + 17 = 19. What is x?
25. 25.Solve: 9x − 89 = 28. What is x?
26. 26.Solve: p/8 + 20 = 24. What is p?
27. 27.Solve: 3(p + 6) = 51. What is p?
28. 28.Solve: 2(m + 9) = 42. What is m?
29. 29.Solve: 9p + 12 = 120. What is p?
30. 30.Solve: 5m − 26 = 4. What is m?
31. 31.Solve: 2m − 5 = 5. What is m?
32. 32.Solve: p/7 + 8 = 22. What is p?
33. 33.Solve: 9n − 4 = 113. What is n?
34. 34.Zoya thinks of a number, multiplies it by 3 and then adds 3. The result is 36. What is the number?
35. 35.Solve: t/3 + 15 = 24. What is t?
36. 36.Meera’s mother is four times as old as Meera. Their ages add up to 60 years. How old is Meera?
37. 37.Solve: 8n + 17 = 65. What is n?
38. 38.Solve: 2m − 1 = 11. What is m?
39. 39.Lakshmi is 7 years older than a cousin. Their ages add up to 15 years. How old is the cousin?
40. 40.Meera is 1 years older than a cousin. Their ages add up to 11 years. How old is the cousin?

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