Comenzando con la misma matriz aumentada, tenemos \[\begin{array}{l}\left(\begin{array}{rrrr}-3&2&-1&-1\\6&-6&7&-7\\3&-4&4&-6\end{array}\right)\to\left(\begin{array}{rrrr}-3&2&-1&-1\\0&-2&5&-9\\0&-2&3...Comenzando con la misma matriz aumentada, tenemos \[\begin{array}{l}\left(\begin{array}{rrrr}-3&2&-1&-1\\6&-6&7&-7\\3&-4&4&-6\end{array}\right)\to\left(\begin{array}{rrrr}-3&2&-1&-1\\0&-2&5&-9\\0&-2&3&-7\end{array}\right)\to\left(\begin{array}{rrrr}-3&0&4&-10\\0&-2&5&-9\\0&0&-2&2\end{array}\right) \\ \to\left(\begin{array}{rrrr}-3&0&4&-10\\0&-2&5&-9\\0&0&1&-1\end{array}\right)\to\left(\begin{array}{rrrr}-3&0&0&-6\\0&-2&0&-4\\0&0&1&-1\end{array}\right)\to\left(\begin{array}{rrrr}1&0&0&2\\0&1&0&2…
