Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 117 · 40 sums

The method (Letters one side, numbers the other): Open brackets: a(x − b) = ax − ab. Fractions: multiply both sides by the LCM of the denominators — x/3 + x/4 = 14 → 4x + 3x = 168. Move letter terms to one side and numbers to the other (change the sign when a term crosses =), then divide. Word problems: consecutive numbers are n, n + 1, n + 2 …; ages in y years are age + y.

1. 1.Solve: 7n + 14 = 5n + 22. What is n?
2. 2.A father is 12 years older than his son. In 1 year, the father will be four times as old as his son. How old is the son now?
3. 3.Solve: 8t + 14 = 2t + 50. What is t?
4. 4.The length of a rectangle is 11 cm more than its width. Its perimeter is 78 cm. What is its width (in cm)?
5. 5.Solve: t/2 + t/4 = 3. What is t?
6. 6.Solve: m/5 + m/6 = 22. What is m?
7. 7.Solve: 4(t − 5) = 2t + 18. What is t?
8. 8.Solve: 9n + 2 = 5n + 34. What is n?
9. 9.Solve: 9y + 3 = 2y + 45. What is y?
10. 10.The sum of two consecutive whole numbers is 63. What is the largest of them?
11. 11.The sum of two consecutive whole numbers is 41. What is the smallest of them?
12. 12.The length of a rectangle is 11 cm more than its width. Its perimeter is 82 cm. What is its width (in cm)?
13. 13.Solve: 4(n − 5) = 3n + 10. What is n?
14. 14.Solve: 4(x − 1) = 2x + 6. What is x?
15. 15.Solve: 4(t − 5) = t + 34. What is t?
16. 16.Solve: 5(t − 5) = 3t + 9. What is t?
17. 17.Solve: 3y + 2 = y + 32. What is y?
18. 18.A father is 8 years older than his son. In 4 years, the father will be twice as old as his son. How old is the son now?
19. 19.Solve: m/2 + m/6 = 16. What is m?
20. 20.A father is 7 years older than his son. In 2 years, the father will be twice as old as his son. How old is the son now?
21. 21.A father is 24 years older than his son. In 6 years, the father will be four times as old as his son. How old is the son now?
22. 22.A father is 39 years older than his son. In 5 years, the father will be four times as old as his son. How old is the son now?
23. 23.Solve: 6t + 13 = 4t + 39. What is t?
24. 24.The length of a rectangle is 13 cm more than its width. Its perimeter is 142 cm. What is its width (in cm)?
25. 25.The length of a rectangle is 15 cm more than its width. Its perimeter is 82 cm. What is its width (in cm)?
26. 26.A father is 14 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
27. 27.The sum of two consecutive whole numbers is 87. What is the smallest of them?
28. 28.Solve: x/3 + x/2 = 35. What is x?
29. 29.A father is 33 years older than his son. In 3 years, the father will be four times as old as his son. How old is the son now?
30. 30.Solve: 4p + 17 = 2p + 41. What is p?
31. 31.A father is 6 years older than his son. In 3 years, the father will be twice as old as his son. How old is the son now?
32. 32.A father is 8 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
33. 33.The sum of two consecutive whole numbers is 65. What is the smallest of them?
34. 34.Solve: p/3 + p/4 = 49. What is p?
35. 35.A father is 11 years older than his son. In 6 years, the father will be twice as old as his son. How old is the son now?
36. 36.The length of a rectangle is 5 cm more than its width. Its perimeter is 50 cm. What is its width (in cm)?
37. 37.Solve: 4(y − 1) = y + 2. What is y?
38. 38.A father is 10 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
39. 39.The sum of three consecutive whole numbers is 162. What is the smallest of them?
40. 40.Solve: 4y + 2 = 3y + 16. What is y?

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