Question

The cost of a notebook is twice the cost of a pen. Write a linear equation in two variable to represent this statement.
(Take the cost of a notebook to be rs.x and that of a pen to be rs.y)
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Please show the full solution
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Answer 1

Let the cost of the notebook be RS X
and the cost of pen be RS y

By the given condition,
cost of notebook=2*cost of pen
x=2y

x-2y=0 is the linear equation

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'.