\(\frac{y+z+1}{x}=\frac{x+z+2}{y}=\)\(\frac{x+y-3}{z}=\frac{2\left(x+y+z\right)}{x+y+z}=\frac{1}{x+y+z}\)
\(\Rightarrow\frac{1}{x+y+z}=2\Rightarrow x+y+z=\frac{1}{2}\)
\(\frac{y+z+1}{x}+1=\frac{\frac{3}{2}}{x}=3\Rightarrow x=\frac{1}{2}\)
Tương tự suy ra \(y=\frac{5}{6},z=-\frac{5}{6}\)
k cho mình nha!