Question

The cost of a note book is twice the cost of a pen. If the cost of a note book is $x$ and that of a pen is $y$ then a linear equation in two variable to represent is

• A. $x+2y=0$
• B. $x-2y=0$
• C. $-x+2y=0$
• D. $2x-y=0$

Answer 1

The correct option is B $x-2y=0$

If the cost of a note book $=x$ and cost of a pen $=y$
According to the question
$\Rightarrow x=2y$
Then linear equation
$\Rightarrow x-2y=0$