## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$-\frac{1}{328}$
The opposite of a real number $a$ is written as $-a$. Therefore, the opposite of $a$ is the negative of $a$. Therefore, if $x=\frac{1}{328}$, then $-x=-(\frac{1}{328})=-\frac{1}{328}$.