From the C to the F

With a little bit of rearrangement we get:

$C= \frac{-32}{\big(\frac{9}{5} - n\big)}$

The graph of $\displaystyle C$ vs $\displaystyle n$ is a hyperbola. Indeed there are infinitely many pairs $(C, n)$ satisfying the given equation. Now we need to look for the values of $\displaystyle n$ for which the curve is not defined, i.e., the asymptote. Here the asymptote is the line $\displaystyle n = \frac{9}{5}$ .

Thus, $n = \boxed{1.8}$ is the value of $n$ not satisfying given equation.