Solve for $v$ - simplify as much as possible Solve for $v$. Simplify the answer.
$$-3 = -\frac{8}{v-1}$$
Here is what I tried:
$$-3 = \frac{-8}{v-1} $$
$$(-8) \cdot (-3) = \frac{-8}{v-1} \cdot (-8) $$
$$24 = v-1$$ 
$$25 = v$$

I'd probably start by taking a reciprocal of both sides:
$$
\begin{align}
-3&=-\frac{8}{v-1}\\
-\frac{1}{3}&=-\frac{v-1}{8}\\
(-8)-\frac{1}{3}&=-\frac{v-1}{8}(-8)\\
\frac{8}{3}&=v-1\\
\frac{8}{3}+1&=v\\
\frac{11}{3}&=v
\end{align}
$$
