\(\frac{x-5}{y-4}=\frac{5}{4}\) và x - y = 6
\(\frac{x-5}{y-4}=\frac{5}{4}\) => \(\left(x-5\right)\cdot4=\left(y-4\right)\cdot5\)
=> 4x - 20 = 5y - 20
=> 4x = 5y => \(\frac{x}{5}=\frac{y}{4}\)
Áp dụng t/c DTSBN ta có:
\(\frac{x}{5}=\frac{y}{4}=\frac{x-y}{5-4}=\frac{6}{1}=6\)
\(\Rightarrow\left\{{}\begin{matrix}\frac{x}{5}=6\Leftrightarrow x=5\cdot6=30\\\frac{y}{4}=6\Leftrightarrow y=4\cdot6=24\end{matrix}\right.\)
Vậy x = 30 và y = 24