If $\frac{a}{b}$ is additive inverse of $\frac{-c}{d}$, then $\frac{-c}{d}$ is additive inverse of ______.
Answer
If $\frac{a}{b}$ is additive inverse of $\frac{-c}{d}$, then $\frac{-c}{d}$ is additive inverse of $\frac{a}{b}$. Also so $\frac{a}{b}+\frac{(-c)}{d}-\frac{(-c)}{d}+\frac{a}{b}=0$.