Question

Cost of a book is twice the cost of a pen write a linear equation in two variable to represent this situation

Answer 1

Answer:

Book=X

Pen=y

As in the question that book is twice the cost of pen so..

X=2y

Therefore:-

X-2y=0

Answer 2

Answer:

Step-by-step explanation:

Let the cost of book be x and that of pen be y.

Therefore from the given condition we get,

x=2y

x-2y =0