Решить матрицу методом Гаусса!

Решите задачу:

$\left[\begin{array}{ccc|c|c}2&1&0&4&\downarrow\\1&-1&5&14&\uparrow\\9&7&4&35&\end{array}\right]\ \textgreater \ \left[\begin{array}{ccc|c|c}1&-1&5&14&\downarrow\\2&1&0&4&-2\\9&7&4&35&-9\end{array}\right]\ \textgreater \ \\\ \textgreater \ \left[\begin{array}{ccc|c|c}1&-1&5&14&\\0&3&-10&-24&:3\\0&16&-41&-91&\end{array}\right]\ \textgreater \ \left[\begin{array}{ccc|c|c}1&-1&5&14&1\\0&1&-\frac{10}{3}&-8&\updownarrow\\0&16&-41&-91&-16\end{array}\right]\ \textgreater \$
$\ \textgreater \ \left[\begin{array}{ccc|c|c}1&0&\frac{5}{3}&6&\\0&1&-\frac{10}{3}&-8&\\0&0&\frac{37}{3}&37&*\frac{3}{37}\end{array}\right]\ \textgreater \ \left[\begin{array}{ccc|c|c}1&0&\frac{5}{3}&6&-\frac{5}{3}\\0&1&-\frac{10}{3}&-8&\frac{10}{3}\\0&0&1&3&\uparrow\end{array}\right]\ \textgreater \ \\\ \textgreater \ \left[\begin{array}{ccc|c|c}1&0&0&1&\\0&1&0&2&\\0&0&1&3&\end{array}\right]\\X= \left[\begin{array}{c}1\\2\\3\end{array}\right]$