Ncert Solutions Class 9 Chapter 4 Linear Equations in Two Variables Exercise 4.1 Question 1

1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. 
(Take the cost of a notebook to be Rs x and that of a pen to be Rs y).

Linear Equations in Two Variables

Exercise 4.1

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Class 9

Linear Equations in Two Variables

Exercise 4.1

1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. 
(Take the cost of a notebook to be Rs x and that of a pen to be Rs y).

2. Express the following linear equations in the form (ax + by + c = 0) and indicate the values of a, b and c in each case:

(i) (2x + 3y =9.bar{35}) 
(ii) (x –frac{y}{5} – 10 = 0)
(iii) (–2x + 3y = 6)
(iv) (x = 3y)
(v) (2x = –5y)
(vi) (3x + 2 = 0)
(vii) (y – 2 = 0)
(viii) (5 = 2x)

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