Nghiệm của hệ phương trình \(\left\{{}\begin{matrix}3x-2y-z=7\\-4x+3y-2z=15\\-x-2y+3z=-5\end{matrix}\right.\) là
\(\left(x;y;z\right)=\left(-10;7;9\right)\).\(\left(x;y;z\right)=\left(\dfrac{3}{2};-2;\dfrac{3}{2}\right)\).\(\left(x;y;z\right)=\left(-\dfrac{1}{4};-\dfrac{9}{2};\dfrac{5}{4}\right)\).\(\left(x;y;z\right)=\left(-5;-7;-8\right)\).