Class 8 Maths Worksheet: Linear Equations

Maths worksheets lesson 60: Linear equations in one variable · Set 932 · 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 8 cm more than its width. Its perimeter is 48 cm. What is its width (in cm)?
2. 2.Solve: 6(p − 1) = p + 19. What is p?
3. 3.A father is 14 years older than his son. In 7 years, the father will be twice as old as his son. How old is the son now?
4. 4.Solve: 7x + 16 = 6x + 17. What is x?
5. 5.Solve: y/6 + y/2 = 16. What is y?
6. 6.Solve: y/5 + y/4 = 54. What is y?
7. 7.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?
8. 8.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?
9. 9.The sum of four consecutive whole numbers is 122. What is the largest of them?
10. 10.Solve: 6m + 18 = m + 88. What is m?
11. 11.Solve: t/4 + t/3 = 21. What is t?
12. 12.The sum of three consecutive whole numbers is 69. What is the smallest of them?
13. 13.Solve: 5(x − 3) = 3x + 3. What is x?
14. 14.Solve: 5y + 2 = 4y + 11. What is y?
15. 15.The sum of two consecutive whole numbers is 115. What is the largest of them?
16. 16.A father is 11 years older than his son. In 4 years, the father will be twice as old as his son. How old is the son now?
17. 17.The sum of four consecutive whole numbers is 42. What is the largest of them?
18. 18.Solve: 6(m − 4) = 4m + 24. What is m?
19. 19.The length of a rectangle is 3 cm more than its width. Its perimeter is 58 cm. What is its width (in cm)?
20. 20.Solve: t/5 + t/4 = 36. What is t?
21. 21.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?
22. 22.Solve: p/4 + p/6 = 35. What is p?
23. 23.Solve: x/5 + x/6 = 77. What is x?
24. 24.Solve: 6(x − 3) = x + 2. What is x?
25. 25.The length of a rectangle is 10 cm more than its width. Its perimeter is 132 cm. What is its width (in cm)?
26. 26.A father is 24 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?
27. 27.The length of a rectangle is 1 cm more than its width. Its perimeter is 26 cm. What is its width (in cm)?
28. 28.Solve: n/3 + n/6 = 9. What is n?
29. 29.The length of a rectangle is 11 cm more than its width. Its perimeter is 74 cm. What is its width (in cm)?
30. 30.A father is 36 years older than his son. In 8 years, the father will be four times as old as his son. How old is the son now?
31. 31.A father is 12 years older than his son. In 4 years, the father will be twice as old as his son. How old is the son now?
32. 32.The sum of two consecutive whole numbers is 13. What is the largest of them?
33. 33.A father is 7 years older than his son. In 3 years, the father will be twice as old as his son. How old is the son now?
34. 34.Solve: 4(m − 3) = 3m + 9. What is m?
35. 35.Solve: 9x + 3 = 4x + 48. What is x?
36. 36.Solve: m/5 + m/6 = 22. What is m?
37. 37.The length of a rectangle is 14 cm more than its width. Its perimeter is 144 cm. What is its width (in cm)?
38. 38.A father is 10 years older than his son. In 4 years, the father will be twice as old as his son. How old is the son now?
39. 39.Solve: 3x + 12 = 2x + 16. What is x?
40. 40.Solve: 4(t − 2) = t + 7. What is t?

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