I use the following code to generate this:
\begin{center}
2 Iteración\\
Fila $S_{1}$
\end{center}
\small
\[\begin{array}{crl}
\kbordermatrix{\mbox{ }&
& & & & & & \\
Fila Vieja & 0 & 2 & 1 & 1 & 0 & 0 &18 \\
C. Pivote & 2 & 2 & 2 & 2 & 2 & 2 &2\\
Nueva F. Pivote & 0 & 1 & 1/3 & 0 & 0 & 1/3 & 8 \\\cline{2-8}
Nueva Fila & 0 & 0 & 1/3 & 1 & 0 & -2/3 & 2 \\
}
\end{array}\]
\begin{center}
Fila $S_{2}$
\end{center}
\small
\[\begin{array}{crl}
\kbordermatrix{\mbox{ }&
& & & & & & \\
Fila Vieja & 0 & 2 & 3 & 0 & 1 & 0 & 42 \\
C. Pivote & 2 & 2 & 2 & 2 & 2 & 2 &2\\
Nueva F. Pivote & 0 & 1 & 1/3 & 0 & 0 & 1/3 & 8 \\\cline{2-8}
Nueva Fila & 0 & 0 & 7/3 & 0 & 1 & -2/3 & 26 \\
}
\end{array}\]
\begin{center}
Fila $Z$
\end{center}
\small
\[\begin{array}{crl}
\kbordermatrix{\mbox{ }&
& & & & & & \\
Fila Vieja & 1 & -3 & -2 & 0 & 0 & 0 & 0 \\
C. Pivote & -3 & -3 & -3 & -3 & -3 & -3 & -3\\
Nueva F. Pivote & 0 & 1 & 1/3 & 0 & 0 & 1/3 & 8 \\\cline{2-8}
Nueva Fila & 1 & 0 & -1 & 0 & 0 & 1 & 24 \\
}
\end{array}\]
My question is how could I do this in multiple columns?
I'm sorry, I'm having some exercises the simplex method to latex, but I see that you are spreading far, so I started to investigate how to place this in 3 columns thing I could not do.
Example
