Problem:
Convert the following matrix to reduced row echelon form:
$\left(
\begin{array}{ccccc}
 -5 & -7 & 2 & 3 & 9 \\
 5 & 7 & 0 & -9 & -10 \\
 3 & 7 & 0 & -6 & 4 \\
 -10 & -3 & -7 & 9 & -3 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{ccccc}
 1 & 0 & 0 & 0 & -\frac{295}{86} \\
 0 & 1 & 0 & 0 & \frac{351}{86} \\
 0 & 0 & 1 & 0 & \frac{571}{86} \\
 0 & 0 & 0 & 1 & \frac{307}{129} \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/row_reduce/33402.txt'}