\documentclass{article}
\usepackage{amsmath}
\usepackage{xepersian}
\begin{document}
\[
\left[ 
\begin{array}{rrrr}
1&0&0\\
-1&1&0\\
2&-1&1
\end{array} \right]
Y=\left[ 
\begin{array}{r}
2\\
0\\
1
\end{array} \right]
\Longrightarrow Y=\left[ 
\begin{array}{r}
2\\
2\\
-1
\end{array} \right], \text{ مرحله‌ی اول }
\]


\end{document}