NCERT Class 8 Maths Chapter 2 Linear Equations in One Variable Exercise 2.1

Chapter 2 Linear Equations in One Variable Exercise 2.1

Solve the following equations.
Question 1: x - 2 = 7
Answer:
= x - 2 = 7
= x = 7 + 2
= x = 9

Question 2: y + 3 = 10
Answer:
= y + 3 = 10
= y = 10 - 3
= y = 7

Question 3: 6 = z + 2
Answer:
= 6 = z + 2
= 6 - 2 = z
= z = 4

Question 4: 3/7 + x = 17/7
Answer:
= 3/7 + x = 17/7
= x = 17/7 - 3/7
= x = 17 - 3/7
= x = 14/7 or 2

Question 5: 6x = 12
Answer:
= 6x = 12
= x = 12/6
= x = 2

Question 6: t/5 = 10
Answer:
= t/5 = 10
= t = 10 × 5
= t = 50

Question 7: 2x/3 = 18
Answer:
= 2x/3 = 18
= 2x = 18 × 3
= 2x = 54
= x = 54/2
= x = 27

Question 8: 1.6 = y/1.5
Answer:
= 1.6 = y/1.5
= 1.6 × 1.5 = y
= y = 2.4

Question 9: 7x - 9 = 16
Answer:
= 7x - 9 = 16
= 7x = 16 + 9
= 7x = 25
= x = 25/7

Question 10: 14y - 8 = 13
Answer:
= 14y - 8 = 13
= 14y = 13 + 8
= 14y = 21
= y = 21/14

Question 11: 17 + 6p = 9
Answer:
= 17 + 6p = 9
= 6p = 9 - 17
= 6p = -8
= p = -8/6

Question 12: x/3 + 1 = 7/15
Answer:
= x/3 + 1 = 7/15
= x/3 = 7/15 - 1
= x/3 = -8/15
= x = -8/15 x 3
= x = -8/5