Giải hệ phương trình sau: \(\left\{ \begin{array}{l}5x - 6y = - 32\\3x + 6y = 48\end{ar

* Hướng dẫn giải

 \(\begin{array}{l}\,\,\left\{ \begin{array}{l}5x - 6y = - 32\\3x + 6y = 48\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}8x = 16\\5x - 6y = - 32\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}x = 2\\5.2 - 6y = - 32\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}x = 2\\6y = 42\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}x = 2\\y = 7\end{array} \right.\end{array}\)