\(\frac{x}{3}=\frac{y}{4}\Rightarrow\frac{x}{4}=\frac{y}{3}\)
= \(\frac{y}{3}=\frac{z}{5}\)
= \(\frac{x}{4}=\frac{y}{3}=\frac{z}{5}=\frac{2x-3y+z}{8-9+5}=\frac{6}{6}=1\)
\(\frac{x}{4}=1\Rightarrow x=1.4=4\)
\(\frac{y}{3}=1\Rightarrow y=1.3=3\)
\(\frac{z}{5}=1\Rightarrow z=1.5=5\)
CHắc vậy l-i-k-e nha !
\(\frac{x}{3}=\frac{y}{4};\frac{y}{3}=\frac{z}{5}\)
\(\frac{x}{3}\Rightarrow\frac{x}{9};\frac{y}{4}\Rightarrow\frac{y}{12};\frac{z}{5}\Rightarrow\frac{z}{20}\)
\(\Rightarrow\frac{x}{9}=\frac{y}{12}=\frac{z}{20}\)
\(\frac{x}{9}\Rightarrow\frac{2x}{18};\frac{y}{12}\Rightarrow\frac{3y}{36}\)
\(\frac{2x}{18}=\frac{3y}{36}=\frac{z}{20}=\frac{2x-3x+x}{18-36+20}=\frac{6}{2}=3\)
\(\frac{2x}{18}=3\Rightarrow x=27\)
\(\frac{3y}{36}=3\Rightarrow y=36\)
\(\frac{z}{20}=3\Rightarrow z=60\)
tíc mình nha