# Solve this system of equations!

$\begin{cases} ad = 1 \\ ae+bd = -6 \\ af+be+dc = 15 \\bf+ec = -18 \\cf = -7\end{cases}$
$\begin{cases} ad = 1 \\ ae+bd = -6 \\ af+be+dc = 15 \\bf+ec = -18 \\cf = -7\end{cases}$