Class 7 Maths Worksheet: Simple Equations

Maths worksheets lesson 51: Simple equations · Set 379 · 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: 8y + 1 = 9. What is y?
2. 2.Rohan thinks of a number, multiplies it by 4 and then adds 28. The result is 64. What is the number?
3. 3.Solve: 8n + 23 = 111. What is n?
4. 4.Solve: 9x + 24 = 123. What is x?
5. 5.Solve: t/9 + 18 = 20. What is t?
6. 6.Solve: 3m + 25 = 52. What is m?
7. 7.Solve: 7(x + 6) = 84. What is x?
8. 8.Solve: 2m + 19 = 39. What is m?
9. 9.Solve: n/9 + 3 = 16. What is n?
10. 10.Solve: 7y − 7 = 7. What is y?
11. 11.Priya thinks of a number, multiplies it by 3 and then adds 18. The result is 27. What is the number?
12. 12.Solve: 8(p + 9) = 104. What is p?
13. 13.Solve: 8(m + 1) = 72. What is m?
14. 14.Aarav thinks of a number, multiplies it by 8 and then adds 27. The result is 131. What is the number?
15. 15.Solve: 5y − 34 = 6. What is y?
16. 16.Aarav thinks of a number, multiplies it by 6 and then adds 7. The result is 13. What is the number?
17. 17.Solve: 4n + 19 = 55. What is n?
18. 18.Solve: t/6 + 1 = 5. What is t?
19. 19.Rohan’s mother is four times as old as Rohan. Their ages add up to 30 years. How old is Rohan?
20. 20.Isha is 1 years older than a cousin. Their ages add up to 19 years. How old is the cousin?
21. 21.Solve: 7(p + 2) = 35. What is p?
22. 22.Solve: x/2 + 9 = 10. What is x?
23. 23.Dev thinks of a number, multiplies it by 6 and then adds 25. The result is 73. What is the number?
24. 24.Solve: 4m + 7 = 15. What is m?
25. 25.Solve: 6m − 13 = 11. What is m?
26. 26.Solve: 6p − 60 = 18. What is p?
27. 27.Solve: 4n − 21 = 15. What is n?
28. 28.Joseph thinks of a number, multiplies it by 8 and then adds 23. The result is 127. What is the number?
29. 29.Solve: 7t − 21 = 14. What is t?
30. 30.Saanvi thinks of a number, multiplies it by 5 and then adds 6. The result is 21. What is the number?
31. 31.Solve: 5(y + 6) = 80. What is y?
32. 32.Zoya’s mother is four times as old as Zoya. Their ages add up to 50 years. How old is Zoya?
33. 33.Arjun thinks of a number, multiplies it by 2 and then adds 24. The result is 40. What is the number?
34. 34.Solve: p/9 + 7 = 19. What is p?
35. 35.Solve: 4y − 32 = 20. What is y?
36. 36.Solve: 7(y + 3) = 119. What is y?
37. 37.Rahul is 2 years older than a cousin. Their ages add up to 30 years. How old is the cousin?
38. 38.Karan thinks of a number, multiplies it by 5 and then adds 4. The result is 64. What is the number?
39. 39.Lakshmi’s mother is four times as old as Lakshmi. Their ages add up to 50 years. How old is Lakshmi?
40. 40.Solve: 7n − 31 = 32. What is n?

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