Question

a cost of book is twice of the the cost of pen write ​

Answer 1

Answer:

Ur question is not complete dear...

Answer 2

Answer:

THE ANSWER WILL BE x-2y=0

Step-by-step explanation:

LET THE COST OF NOTEBOOK BE Rs.x

THE COST OF PEN BE Rs.y

COST OF NOTEBOOK TWICE=2×Cost of the notebook

x=2y

x-2y=0

Therefore,

x-2y=0 is the linear equation in two variable