cái này dễ ợt mak bạn cx hỏi

\(\frac{x-2}{x-1}=\frac{x+4}{x+7}\Rightarrow\left(x-2\right)\left(x+7\right)=\left(x-1\right)\left(x+4\right)\)

\(\Rightarrow x^2+5x-14=x^2+3x-4\\ \Rightarrow5x-3x=-4+14\\ \Rightarrow2x=12\\ \Rightarrow x=6\)