Question

The cost of a notebook is twice the cost of a pen . Write a linearvequation 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]

Answer 1

Answer:

Let the cost of a notebook be Rs. x and that of a pen be Rs. y.

Given the cost of a notebook is twice the cost of a pen.

Then x=2y

or, x−2y=0.

This is the required linear equation in two variable.

Answer 2

Answer:

x=2y

x-2y=0. where x is cost of notebook and y is cost of pen