Question

the cost of a notebook is twice the cost of a pen.write a linear equation in two variables to represent this situation.

Answer 1

Answer:

Let the cost of a pen be =x

given that the cost of a notebook is twice the cost of a pen.

now the cost of a notebook be =y

Step-by-step explanation:

Then the equation will be

cost of a notebook = 2x+y

Answer 2

Step-by-step explanation:

let the cost of the pen be = x

so the notebook is twice the cost of pen so

= 2x

hence the equation will be ;

x+2x