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 cost of notes be y

let cost a pen be x

cost of note= 2x=y

x=y/2

2(y/2)=y

2y/4=y

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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

$\: \: \: \: \: \: : \sf \ \implies x = 2×y$

$\: \: \: \: \: \: \sf : \implies{x = 2y}$

$\: \: \: \: \: \: \ : \implies \boxed {\frak{x - 2y = 0} } \orange\bigstar$

Hence,

• 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’.

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