[texhax] fbox in align environment

[E. Krishnan]

On Sun, 14 Jun 2009, Sebastian Canagaratna wrote:

> Say you have three equations in an align environment. You want to box
> only one of them, say the last one. How does one do this?


Please check whether this meets your needs:

   \usepackage{amsmath}

   \begin{equation*}
     \setlength{\arraycolsep}{0pt}
     \renewcommand{\arraystretch}{1.25}
     \begin{array}{r@{\;}c@{\;}r@{\;}}
       x+y+2    & = & 1\\
       2x+3y-4z & = & 2\\
       \hline
       \multicolumn{1}{|r@{\;}}{3x-2y+z}
       & \multicolumn{1}{c@{\;}}{=}
       & \multicolumn{1}{r@{\;}|}{3}\\
       \hline
     \end{array}
   \end{equation*}





-- 
Krishnan