\(\Rightarrow x+\frac{3}{4}=0\Rightarrow x=-\frac{3}{4}\)
\(y-\frac{1}{5}=0\Rightarrow y=\frac{1}{5}\)
\(x+y+z=0\Leftrightarrow-\frac{3}{4}+\frac{1}{5}+z=0\Rightarrow-\frac{11}{20}+z=0\Rightarrow z=\frac{11}{20}\)
Vậy x = \(-\frac{3}{4}\) ; y = \(\frac{1}{5}\) ; z = \(\frac{11}{20}\)