Put the matrix in reduced row echelon form:
\[\begin{bmatrix} -2 & -2 & 4 & 0 \\ -2 & -2 & 4 & 3 \\ 4 & -1 & -18 & -2 \end{bmatrix}\]Click for (rounded) answer
Click for Latex code
\[
\begin{bmatrix}
-2 & -2 & 4 & 0 \\
-2 & -2 & 4 & 3 \\
4 & -1 & -18 & -2
\end{bmatrix}
\]
Solution:
\begin{solution}
\[
\begin{bmatrix}
1 & 0 & -4 & 0 \\
0 & 1 & 2 & 0 \\
0 & 0 & 0 & 1
\end{bmatrix}
\]
\end{solution}