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

$-\frac{7}{2}$
The opposite of a real number $a$ is $-a$. For any two numbers $a$ and $-a$, $a+(-a)=0$. That is, the sum of a number and its opposite is equal to 0. Therefore, the opposite of $\frac{7}{2}$ is $-\frac{7}{2}$, because $\frac{7}{2}+(-\frac{7}{2})=0$.