Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 639 · 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: m/5 + m/6 = 33. What is m?
2. 2.The length of a rectangle is 2 cm more than its width. Its perimeter is 72 cm. What is its width (in cm)?
3. 3.Solve: x/6 + x/3 = 6. What is x?
4. 4.The length of a rectangle is 11 cm more than its width. Its perimeter is 58 cm. What is its width (in cm)?
5. 5.Solve: 4(t − 3) = 3t + 4. What is t?
6. 6.The length of a rectangle is 4 cm more than its width. Its perimeter is 20 cm. What is its width (in cm)?
7. 7.Solve: 6(y − 4) = y + 61. What is y?
8. 8.Solve: 6(n − 1) = 4n + 14. What is n?
9. 9.The sum of two consecutive whole numbers is 27. What is the largest of them?
10. 10.A father is 24 years older than his son. In 2 years, the father will be four times as old as his son. How old is the son now?
11. 11.The length of a rectangle is 13 cm more than its width. Its perimeter is 62 cm. What is its width (in cm)?
12. 12.Solve: x/5 + x/6 = 11. What is x?
13. 13.The length of a rectangle is 7 cm more than its width. Its perimeter is 26 cm. What is its width (in cm)?
14. 14.Solve: 5(n − 2) = 3n + 4. What is n?
15. 15.The length of a rectangle is 6 cm more than its width. Its perimeter is 56 cm. What is its width (in cm)?
16. 16.A father is 21 years older than his son. In 4 years, the father will be four times as old as his son. How old is the son now?
17. 17.A father is 57 years older than his son. In 7 years, the father will be four times as old as his son. How old is the son now?
18. 18.Solve: 5(n − 5) = 2n + 38. What is n?
19. 19.The sum of four consecutive whole numbers is 54. What is the largest of them?
20. 20.The length of a rectangle is 4 cm more than its width. Its perimeter is 32 cm. What is its width (in cm)?
21. 21.Solve: 3x + 5 = x + 31. What is x?
22. 22.Solve: 4(x − 3) = 3x + 13. What is x?
23. 23.A father is 38 years older than his son. In 8 years, the father will be three times as old as his son. How old is the son now?
24. 24.Solve: 6t + 2 = t + 32. What is t?
25. 25.Solve: t/4 + t/5 = 27. What is t?
26. 26.Solve: 5p + 10 = p + 50. What is p?
27. 27.A father is 27 years older than his son. In 7 years, the father will be four times as old as his son. How old is the son now?
28. 28.A father is 24 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?
29. 29.The sum of three consecutive whole numbers is 93. What is the smallest of them?
30. 30.A father is 12 years older than his son. In 7 years, the father will be twice as old as his son. How old is the son now?
31. 31.The length of a rectangle is 3 cm more than its width. Its perimeter is 82 cm. What is its width (in cm)?
32. 32.The sum of three consecutive whole numbers is 39. What is the largest of them?
33. 33.Solve: 7n + 16 = 6n + 26. What is n?
34. 34.Solve: 9p + 14 = 2p + 105. What is p?
35. 35.Solve: t/2 + t/3 = 20. What is t?
36. 36.Solve: x/6 + x/4 = 40. What is x?
37. 37.Solve: 5(n − 1) = n + 27. What is n?
38. 38.Solve: y/3 + y/6 = 6. What is y?
39. 39.The sum of four consecutive whole numbers is 70. What is the smallest of them?
40. 40.A father is 28 years older than his son. In 8 years, the father will be three times as old as his son. How old is the son now?

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