\(3y=4z-2y\Rightarrow4z=5y\)
Áp dụng tính chất dãy tỉ số bằng nhau, ta có:
\(2x=5y=4z=\frac{x}{\frac{1}{2}}=\frac{y}{\frac{1}{5}}=\frac{z}{\frac{1}{4}}=\frac{x+y+z}{\frac{1}{2}+\frac{1}{5}+\frac{1}{4}}=\frac{45}{\frac{19}{20}}=\frac{900}{19}\)
\(2x=\frac{900}{19}\Rightarrow x=\frac{900}{19}:2=\frac{450}{19}\)
\(5y=\frac{900}{19}\Rightarrow y=\frac{900}{19}:5=\frac{180}{19}\)
\(4z=\frac{900}{19}\Rightarrow z=\frac{900}{19}:4=\frac{225}{19}\)