Ta có\(\frac{Yx7x8}{12x56}=\frac{3}{4}\Leftrightarrow\frac{Yx56}{672}=\frac{3}{4}=\frac{504}{672}\)\(\Rightarrow Yx56=504\Rightarrow y=504:56=9\)Vaayj Y=9Câu trả lời: Ta có\(\frac{Yx7x8}{12x56}=\frac{3}{4}\Leftrightarrow\frac{Yx56}{672}=\frac{3}{4}=\frac{504}{672}\)\(\Rightarrow Yx56=504\Rightarrow y=504:56=9\)Vaayj Y=9