ta co\(\frac{6x}{11}=\frac{9y}{2}=\frac{18z}{5}\)\(=\frac{x}{\frac{11}{6}}=\frac{y}{\frac{2}{9}}=\frac{z}{\frac{5}{18}}\)=\(\frac{-x+y+z}{\frac{11}{6}+\frac{2}{9}+\frac{5}{18}}=\frac{120}{\frac{-4}{3}}=-90\)(ap dung tinh chat day ti so bang nhau)
\(\frac{x}{\frac{11}{6}}=-90->x=-165\)lam tuong tu ta duoc y=-20,z=-25 sau do ban do ban doi dau thi duoc x=165,y=20,z=25