Question

The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
(Take the cost of a notebook to be Rs. x and that of a pen to be Rs.y).
Solution:
Let the cost of a notebook = Rs. x
and the cost of a pen = Rs. y
According to the condition, we have
[Cost of a notebook] =2 x [Cost of a pen]
i. e„ (x) = 2 x (y) or, x = 2y
or, x – 2y = 0
Thus, the required linear equation is x – 2y = 0.​

Answer 1

Answer:

x-2y=0

x= notebook

y= pen

Step-by-step explanation:

Let the cost of a notebook = Rs. x

and the cost of a pen = Rs. y [Cost of a notebook] =2 x [Cost of a pen] i. e,, (x) = 2 x (y) or, x = 2y or, x - 2y = 0

According to the condition, we have

Thus, the required linear equation is x - 2y = 0.

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Answer 2

Summary: If the cost of a notebook is twice the cost of a pen, then a linear equation in two variables to represent this statement is x - 2y = 0.\

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