[tex]\left\{\begin{matrix} 3x + 2y = 8 \\ 2x-3y = -12 \\ \end{matrix}\right.[/tex]
[tex]\left\{\begin{matrix} 3x + 2y = 8 & \\ 2x - 3y = -12 & \end{matrix}\right. => \left\{\begin{matrix} 6x + 4 y = 16 & \\ 6x - 9y = -36 & \end{matrix}\right. =>( 6x + 4y) - (6x - 9y)= 16 -(-36) => 13x = 52 => x = 4 => y = -2. Vậy x = 4 ; y = -2.[/tex]