Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 296 · 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: x/4 + x/3 = 42. What is x?
2. 2.A father is 27 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?
3. 3.The length of a rectangle is 8 cm more than its width. Its perimeter is 48 cm. What is its width (in cm)?
4. 4.The length of a rectangle is 4 cm more than its width. Its perimeter is 100 cm. What is its width (in cm)?
5. 5.The length of a rectangle is 10 cm more than its width. Its perimeter is 132 cm. What is its width (in cm)?
6. 6.Solve: 3(m − 3) = 2m + 8. What is m?
7. 7.The sum of two consecutive whole numbers is 35. What is the smallest of them?
8. 8.Solve: 4m + 19 = 3m + 20. What is m?
9. 9.Solve: y/3 + y/4 = 42. What is y?
10. 10.A father is 34 years older than his son. In 5 years, the father will be three times as old as his son. How old is the son now?
11. 11.Solve: 3n + 1 = n + 13. What is n?
12. 12.Solve: 8x + 2 = 6x + 12. What is x?
13. 13.A father is 30 years older than his son. In 3 years, the father will be three times as old as his son. How old is the son now?
14. 14.The sum of two consecutive whole numbers is 103. What is the largest of them?
15. 15.A father is 18 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?
16. 16.Solve: 5(y − 2) = 2y + 20. What is y?
17. 17.The sum of four consecutive whole numbers is 130. What is the largest of them?
18. 18.A father is 36 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?
19. 19.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?
20. 20.Solve: 7x + 1 = 2x + 36. What is x?
21. 21.Solve: t/3 + t/2 = 15. What is t?
22. 22.The length of a rectangle is 9 cm more than its width. Its perimeter is 106 cm. What is its width (in cm)?
23. 23.Solve: 4n + 14 = 2n + 44. What is n?
24. 24.Solve: 5y + 3 = 2y + 9. What is y?
25. 25.Solve: 3(y − 4) = 2y + 9. What is y?
26. 26.The sum of two consecutive whole numbers is 109. What is the largest of them?
27. 27.The length of a rectangle is 5 cm more than its width. Its perimeter is 78 cm. What is its width (in cm)?
28. 28.Solve: 5(m − 5) = 4m + 10. What is m?
29. 29.A father is 14 years older than his son. In 2 years, the father will be twice as old as his son. How old is the son now?
30. 30.The length of a rectangle is 5 cm more than its width. Its perimeter is 42 cm. What is its width (in cm)?
31. 31.Solve: 4(p − 5) = p + 7. What is p?
32. 32.The length of a rectangle is 15 cm more than its width. Its perimeter is 114 cm. What is its width (in cm)?
33. 33.The sum of three consecutive whole numbers is 99. What is the smallest of them?
34. 34.Solve: 5(t − 4) = t + 48. What is t?
35. 35.The sum of four consecutive whole numbers is 122. What is the largest of them?
36. 36.A father is 13 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
37. 37.The sum of four consecutive whole numbers is 198. What is the largest of them?
38. 38.Solve: 7p + 9 = p + 57. What is p?
39. 39.The length of a rectangle is 7 cm more than its width. Its perimeter is 54 cm. What is its width (in cm)?
40. 40.The length of a rectangle is 9 cm more than its width. Its perimeter is 54 cm. What is its width (in cm)?

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