Question

If $x+y=0$, which of the following must be equivalent to $x-y$?

• A. $-2y$
• B. $\frac{x}{y}$
• C. $x$
• D. $x^2$

Answer 1

The correct option is A $-2y$

As given $x+y=0$

$\therefore x=-y$

Put the value of $x$ in the $x-y$

Then $x-y=-y-y=-2y$