If \(
\begin{bmatrix}
2 & 3 \\[0.3em]
5& 7 \\[0.3em]
\end{bmatrix}\)\(
\begin{bmatrix}
1& -3 \\[0.3em]
-2&4 \\[0.3em]
\end{bmatrix}\) = \(
\begin{bmatrix}
-4& 6 \\[0.3em]
-9&\text{x} \\[0.3em]
\end{bmatrix}\) , find the value of x.
[(2,3)(5,7)] [(1,-3)(-2,4)] = [(-4,6)(-9,x)]