Question:
If $\left[\begin{array}{ll}x & 2\end{array}\right]\left[\begin{array}{l}3 \\ 4\end{array}\right]=2$, find $x$
Solution:
Given : $\left[\begin{array}{ll}x & 2\end{array}\right]\left[\begin{array}{l}3 \\ 4\end{array}\right]=2$
$\Rightarrow 3 x+8=2$
$\Rightarrow 3 x=2-8$
$\Rightarrow 3 x=-6$
$\Rightarrow x=\frac{-6}{3}$
$\Rightarrow x=-2$
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