Inverse Matrix/3x3/6/Aufgabe/Lösung

${}{\begin{pmatrix}1&5&0\\7&2&2\\0&0&-1\end{pmatrix}}$	${}{\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}}$
${}{\begin{pmatrix}1&5&0\\0&-33&2\\0&0&1\end{pmatrix}}$	${}{\begin{pmatrix}1&0&0\\-7&1&0\\0&0&-1\end{pmatrix}}$
${}{\begin{pmatrix}1&5&0\\0&-33&0\\0&0&1\end{pmatrix}}$	${}{\begin{pmatrix}1&0&0\\-7&1&2\\0&0&-1\end{pmatrix}}$
${}{\begin{pmatrix}1&5&0\\0&1&0\\0&0&1\end{pmatrix}}$	${}{\begin{pmatrix}1&0&0\\{\frac {7}{33}}&-{\frac {1}{33}}&-{\frac {2}{33}}\\0&0&-1\end{pmatrix}}$
${}{\begin{pmatrix}1&0&0\\0&1&0\\0&0&1\end{pmatrix}}$	${}{\begin{pmatrix}-{\frac {2}{33}}&{\frac {5}{33}}&{\frac {10}{33}}\\{\frac {7}{33}}&-{\frac {1}{33}}&-{\frac {2}{33}}\\0&0&-1\end{pmatrix}}$

Zur gelösten Aufgabe