jmc

Call the number of regular packs $r$ and the number of super packs $s$. We can use the following system of equations to represent the information given: $$\begin{array}{rl}r+s& =32\\ 4r+6s& =166\end{array}$$ Multiplying the first equation by six and subtracting the second equation from that yields $(6r-4r)+(6s-6s)=(192-166)$. Solving for $r$ gives $2r=26$, or $r=13$. Thus, $\boxed{13}$ regular packs were sent.