I have an array that looks like this:
I'm not sure how I can add the curly brackets and text there.
I formatted the array like this:
\begin{equation*}
\begin{array}{r*{10}{l}}
\trom{1} & 2 + x_1 -2 = x_1 & \\
\trom{2} & 1 + 2s + 0t = x_2 & \\
& 1 + 2s = x_2 \\
\trom{3} & 0 + 2s + 3t = x_3 \\
& \text{Some more calculations}
\end{array}
\end{equation*}
I tried to use the split environment within the array environment:
\begin{equation*}
\begin{array}{r*{10}{l}}
\left .
\begin{split}
\trom{1} & 2 + x_1 -2 = x_1 & \\
\trom{2} & 1 + 2s + 0t = x_2 & \\
& 1 + 2s = x_2 \\
\end{split}
\right \} \textit{Test....}
\\
\trom{3} & 0 + 2s + 3t = x_3 \\
& \text{Some more calculations}
\end{array}
\end{equation*}
But that messes up the "grid":
How can I use the split environment within an array environment? If that's not possible (or if there's a more elegant way), please post it instead.