Câu trả lời:
Ta có:
\(y\) . 7 . \(\frac{8}{12}\) . 56 = \(\frac{5}{6}\)
=> \(y\) . 7 . \(\frac{8}{12}\) = \(\frac{5}{6}\) : 56 =\(\frac{5}{336}\)
=> \(y\) . 7 = \(\frac{5}{336}\div\frac{8}{12}\) = \(\frac{5}{224}\)
=> \(y\) = \(\frac{5}{224}\) : 7 = \(\frac{5}{1568}\)