[tex]\left\{\begin{matrix} 7x-3y=5 & & \\ \frac{x}{2}+\frac{y}{3}=2 & & \end{matrix}\right.[/tex] [tex]\Leftrightarrow \left\{\begin{matrix} 7x-3y=5 & & \\ 3x+2y=12 & & \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} 10x-y=17 & & \\ 3x+2y=12 & & \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} y=10x-17 & & \\ 3x+2(10x-17)=12 & & \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} y=10x-17 & & \\ 23x-34=12 & & \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} y=10.2-17 & & \\ x=2 & & \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} x=2 & & \\ y=3 & & \end{matrix}\right.[/tex]
Vậy HPT có nghiệm duy nhất là (2;3).