Question

the coast of an notebook is twice the coast of a pen write a linear equations to represent
( take the coast of a notebook to be ₹ x and than pen to be ₹ y)​

Answer 1

Cost of Notebook = ₹x
Cost of Pencil = ₹y
So here given is that the cost of Notebook is double than cost of pen so it can be written as
x = 2y.
I hope it might help you