Question

The cost of a book is twice the cost of a fountain pen. Which linear equation in two variables represents this statement?

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

Answer 1

The correct option is A $x=2y$

Let the cost of the book $=$ Rs $x$ and cost of the foundation pen $=$ Rs $y$.
Since cost of a book $=$ Twice the cost of pen
$\Rightarrow$ $x=2y$

$\Rightarrow x-2y=0$

Only option A is correct.