Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 256 · 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.The length of a rectangle is 3 cm more than its width. Its perimeter is 106 cm. What is its width (in cm)?
2. 2.The length of a rectangle is 13 cm more than its width. Its perimeter is 122 cm. What is its width (in cm)?
3. 3.Solve: 3y + 5 = 2y + 9. What is y?
4. 4.Solve: 6(x − 1) = 3x + 36. What is x?
5. 5.A father is 33 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?
6. 6.Solve: 5p + 16 = 2p + 25. What is p?
7. 7.The length of a rectangle is 4 cm more than its width. Its perimeter is 44 cm. What is its width (in cm)?
8. 8.Solve: t/3 + t/4 = 14. What is t?
9. 9.The sum of three consecutive whole numbers is 66. What is the smallest of them?
10. 10.Solve: m/2 + m/3 = 10. What is m?
11. 11.The sum of four consecutive whole numbers is 206. What is the largest of them?
12. 12.The length of a rectangle is 2 cm more than its width. Its perimeter is 56 cm. What is its width (in cm)?
13. 13.Solve: 6p + 2 = 5p + 17. What is p?
14. 14.The sum of two consecutive whole numbers is 105. What is the smallest of them?
15. 15.The length of a rectangle is 11 cm more than its width. Its perimeter is 42 cm. What is its width (in cm)?
16. 16.The length of a rectangle is 5 cm more than its width. Its perimeter is 42 cm. What is its width (in cm)?
17. 17.The length of a rectangle is 3 cm more than its width. Its perimeter is 50 cm. What is its width (in cm)?
18. 18.Solve: y/3 + y/5 = 48. What is y?
19. 19.Solve: 4t + 14 = t + 23. What is t?
20. 20.Solve: 5(p − 2) = p + 30. What is p?
21. 21.Solve: 6m + 16 = 5m + 25. What is m?
22. 22.The sum of two consecutive whole numbers is 121. What is the largest of them?
23. 23.Solve: 4(p − 5) = p + 16. What is p?
24. 24.Solve: p/3 + p/2 = 30. What is p?
25. 25.The sum of two consecutive whole numbers is 53. What is the smallest of them?
26. 26.A father is 30 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?
27. 27.The length of a rectangle is 6 cm more than its width. Its perimeter is 116 cm. What is its width (in cm)?
28. 28.The length of a rectangle is 1 cm more than its width. Its perimeter is 122 cm. What is its width (in cm)?
29. 29.Solve: 3(p − 1) = p + 9. What is p?
30. 30.A father is 7 years older than his son. In 5 years, the father will be twice as old as his son. How old is the son now?
31. 31.Solve: 4(y − 2) = 3y + 12. What is y?
32. 32.The sum of two consecutive whole numbers is 115. What is the smallest of them?
33. 33.Solve: x/3 + x/6 = 21. What is x?
34. 34.Solve: 4(t − 5) = t + 37. What is t?
35. 35.Solve: 4y + 13 = y + 58. What is y?
36. 36.Solve: m/4 + m/6 = 40. What is m?
37. 37.The length of a rectangle is 3 cm more than its width. Its perimeter is 110 cm. What is its width (in cm)?
38. 38.The sum of two consecutive whole numbers is 61. What is the largest of them?
39. 39.Solve: 3(x − 1) = 2x + 1. What is x?
40. 40.The sum of two consecutive whole numbers is 37. What is the largest of them?

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