Đặt \(\dfrac{x}{-3}=\dfrac{y}{7}=k\Rightarrow x=-3k;y=7k\)
\(x^2-y^2=-160\\ \Rightarrow9k^2-49k^2=-160\\ \Rightarrow-40k^2=-160\Rightarrow k^2=4\\ \Rightarrow\left[{}\begin{matrix}k=2\\k=-2\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-6;y=14\\x=6;y=-14\end{matrix}\right.\)