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 x and that of a pen to be? y).

Explanation

Let the cost of a notebook be Rs. x and cost of a pen be Rs. y.
Given the cost of a notebook is twice the cost of a pen.
Then x=2y
It can be re-arranged as:
x−2y=0 ( form of ax+by+c=0)
This is the required linear equation in two variable.