Questão 957137

\(\left\{ \begin{array}{cl} x-y=3 \\ x+y=5 \end{array} \right.\)

\(\left\{ \begin{array}{cl} x+y=3 \\ x-y=5 \end{array} \right.\)

\(\left\{ \begin{array}{cl} x+y=-3 \\ x-y=5 \end{array} \right.\)

\(\left\{ \begin{array}{cl} x-y=-3 \\ x+y=5 \end{array} \right.\)