Question

the cost of a notebook is twice as the cost of a pen, write a linear equation in two variables to represent this statement

Answer 1

let the cost of note. book be X
and cost of pen be Y

according to ur question
2X =Y

Answer 2

Answer:

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

Cost of notebook = 2 × Cost of pen

x = 2y

x − 2y = 0