###### Itemc

Here, the corresponding system of equations is

\begin{equation*} \begin{alignedat}{3} x \amp \amp \amp {}={} \amp 3 \\ \amp \amp y \amp {}={} \amp 0 \\ \amp \amp 0 \amp {}={} \amp 1 \\ \end{alignedat} \end{equation*}

Since the third equation is not satisfied for any values of $$x$$ and $$y\text{,}$$ there are no solutions to the system.

in-context