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Определи множитель, для которого равенство верно:

а) \(\dfrac{2}{5}\cdot\) [ ] \(=\dfrac{14}{15}\) ;

б) \(\dfrac{2}{3}\cdot\) [ ] \(=-\dfrac{2}{15}\) ;

в) \(-\dfrac{1}{7}\cdot\) [ ] \(=\dfrac{3}{14}\) ;

г) [ ] \(\cdot (-\dfrac{1}{5})=-\dfrac{3}{20}\) ;

д) [ ] \(\cdot (-\dfrac{2}{11})=\dfrac{6}{55}\) ;

е) [ ] \(\cdot (-\dfrac{1}{2})=-\dfrac{7}{10}\) ;

ж) \((-\dfrac{1}{7})\cdot\) [ ] \(=\dfrac{1}{7}\) ;

з) [ ] \(\cdot \dfrac{24}{25}=-\dfrac{24}{25}\) .