Đáp án:
\(\left\{ \begin{array}{l}
x = \dfrac{{42}}{{13}}\\
y = - \dfrac{{15}}{{13}}
\end{array} \right.\)
Giải thích các bước giải:
\(\begin{array}{l}
a)\left\{ \begin{array}{l}
2x + 3y = 3\\
3x - 2y = 12
\end{array} \right.\\
\to \left\{ \begin{array}{l}
4x + 6y = 6\\
9x - 6y = 36
\end{array} \right.\\
\to \left\{ \begin{array}{l}
13x = 42\\
3x - 2y = 12
\end{array} \right.\\
\to \left\{ \begin{array}{l}
x = \dfrac{{42}}{{13}}\\
y = - \dfrac{{15}}{{13}}
\end{array} \right.
\end{array}\)
