Question

the cost of notebook is twice the cost of pen. write a linear equations in two variables to represent this statement​

Answer 1

Let the number of notebook be 'x' , and the number of pens be 'y'..

according to the given condition...

x = 2y

therefore...

x - 2y = 0

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Answer 2

Let the cost of a notebook to be = ₹ x

Let the cost of a pen to be = ₹ y

According to the question,

The cost of a notebook is twice the cost of a pen.

i.e., Cost of a notebook = 2×Cost of a pen

$x = 2y$

$x - 2y = 0$

x-2y = 0 is the linear equation in two variables yo represent the statement 'The cost of a notebook is twice the cost of a pen'.