Using Cramer's rule, solve the systems of linear equations: \[ \begin{array}{l} x+y=2 \\ 2 x-z=1...

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Using Cramer's rule, solve the
systems of linear equations:
\[
\begin{array}{l}
x+y=2 \\
2 x-z=1 \\
2 y-3 z=1
\end{array}
\]
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