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Найди неизвестный член пропорции:

а) \(\dfrac{y}{6} = \dfrac{2}{5}\) , \(y = \) [ ];

б) \(\dfrac{x}{2} = \dfrac{7}{10}\) , \(x = \) [ ];

в) \(\dfrac{5}{a}=\dfrac{3}{4}\) , \(a = \) [ ];

г) \(\dfrac{6}{7}=\dfrac{d}{8}\) , \(d = \) [ ];

д) \(\dfrac{11}{12}=\dfrac{k}{9}\) , \(k = \) [ ];

е) \(\dfrac{4}{5}=\dfrac{10}{m}\) , \(m = \) [ ].