Put the matrix in reduced row echelon form:
\[\begin{bmatrix} -5 & 3 & -5 & 20 \\ 0 & 0 & 2 & 4 \\ 2 & 4 & 0 & 14 \end{bmatrix}\]Click for (rounded) answer
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\[ \begin{bmatrix} -5 & 3 & -5 & 20 \\ 0 & 0 & 2 & 4 \\ 2 & 4 & 0 & 14 \end{bmatrix} \]Solution:
\begin{solution} \[ \begin{bmatrix} 1 & 0 & 0 & -3 \\ 0 & 1 & 0 & 5 \\ 0 & 0 & 1 & 2 \end{bmatrix} \] \end{solution}