Answer
$x=4,y=6\text{ and }z=3$.
Work Step by Step
Two matrices are equal if the corresponding elements of the given matrix are equal.
That is,
$\begin{align}
& x=4 \\
& 2y=12 \\
\end{align}$
And,
$z=3$
Now $2y=12$ implies that $y=\frac{12}{2}=6$.
Hence, $x=4,y=6\text{ and }z=3$.
