. 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)
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.
