To solve the equation \( 50.3 ( n + 9.25 ) = -120.72 \), we can follow these steps:
- Divide both sides by 50.3 to isolate \( n + 9.25 \):
\[ n + 9.25 = \frac{-120.72}{50.3} \]
Calculating the right side:
\[ n + 9.25 = -2.4 \]
- Now isolate \( n \) by subtracting 9.25 from both sides:
\[ n = -2.4 - 9.25 \]
Calculating the right side:
\[ n = -11.65 \]
Therefore, the solution is:
\[ \boxed{-11.65} \]