## Algebra: A Combined Approach (4th Edition)

a. 22, b. $\frac{2}{7}$, c. $x$, d. -14, e. -2.3
We know that if $a$ is a number, then $-(-a)=a$. Therefore: a. $-(-22)=22$ b. $-(-\frac{2}{7})=\frac{2}{7}$ c. $-(-x)=x$ d. $-|-14|=-(14)=-14$ e. $-|2.3|=-(2.3)=-2.3$