Question

the cost of a notebook is twice the cost of a pen . write in a linear equation variable to repersent this statement

Answer 1

Let the Cost of the pen be Rs 'X'.
and cost of the pen be 'Y'.
A/q,
X=2Y

Answer 2

let we take the cost of pen is x & the cost of a note book is y

so , cost of notebook= 2× cost of pen
thus
y - 2x =0