A. $\left\{\begin{array}{l}2 x-3 y=6 \\ 4 x+3 y=12\end{array}\right.$
B. $\left\{\begin{array}{l}2 x+3 y=6 \\ 4 x-3 y=12\end{array}\right.$
c. $\left\{\begin{array}{c}3 x+2 y=6 \\ -3 x+4 y=12\end{array}\right.$
D. $\left\{\begin{array}{l}-3 x+2 y=6 \\ 3 x+4 y=12\end{array}\right.$
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