\[\boxed{\mathbf{227\ (227)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{6a}{18a} = \frac{1}{3}\]
\[2)\ \frac{32b}{60} = \frac{8b}{15}\]
\[3)\ \frac{96c}{72c} = \frac{4}{3} = 1\frac{1}{3}\]
\[4)\ \frac{45}{9d} = \frac{5}{d}\]
\[5)\ \frac{39mn}{91mn} = \frac{3}{7}\]
\[6)\ \frac{95ab}{38bc} = \frac{5a}{2c}\]
\[\boxed{\mathbf{227}\mathbf{.}}\]
\[OE = 7\ см.\]
\[MO + EN = 7\ см.\ \]
\[MN = 14\ см.\]
\[Ответ:14\ см.\]