To solve for \( r \) in the equation
\[ -4 = \frac{r}{20} - 5, \]
follow these steps:
- Add 5 to both sides of the equation:
\[ -4 + 5 = \frac{r}{20} \]
This simplifies to:
\[ 1 = \frac{r}{20}. \]
- Next, multiply both sides by 20 to isolate \( r \):
\[ 20 \cdot 1 = r, \]
which gives:
\[ r = 20. \]
Thus, the solution is
\[ \boxed{20}. \]