% arara: indent: { overwrite: on, trace: yes}
\begin{tabular}{p{3cm}|c|p{8cm}}
	Example & Choice                         & Why                                                                      \\ \hline \hline
	\(
	\left\{
	\begin{array}{rl}
	x+y & =6	\\
	2x+y & =8
	\end{array}
	\right.
	\)
	        & Substitution {\em or }Addition & Because it is easy to solve for $x$ in the 1st equation
	{\em or}
	Because it is easy to multiply the first equation by -1 \\ \hline
	\(
	\left\{
	\begin{array}{rl}
	3x-7y & =13 \\
	6x+5y & =7
	\end{array}
	\right.
	\)
	        & Addition                       & Because there is no obvious way to use substitution                      \\ \hline
	\(
	\left\{
	\begin{array}{rl}
	x-7y  & =13 \\
	6x+5y & =7
	\end{array}
	\right.
	\)
	        & Substitution                   & Because the first equation can easily be solved for one of the variables
\end{tabular}