Question

The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.

Answer 1

Answer:

Let the cost of pen be x.

And the cost of notebook be y.

According to question,

The cost of notebook is twice the cost of pen.

So, the cost of notebook= 2x

So, y=2x is the required linear equation in two variable for the given question

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Answer 2

Solution:

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 = 2×y

x = 2y

x-2y = 0

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