Question

the cost of a note book is twice to the cost of a pen write a linear equations in two variable to represent this statement​

Answer 1

Answer:

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.

Answer 2

Answer:

Step-by-step explanation:

cost of note book  = x

cost of pen = y

given x = 2y

∴ $\frac{x}{2} = y$

so

x + y =3y

and also we can write

x - 2y = 0