Пошаговое объяснение:
1)
7:8=х:96
8х=7•96
8х=672
х=672:8
х=84
2)
у:1 5/31=7 3/4:1/3
у:36/31=31/4:1/3
1/3•у=36/31•31/4
1/3•у=9
у=9:1/3
у=9•3
у=27
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Пошаговое объяснение:
1)
7:8=х:96
8х=7•96
8х=672
х=672:8
х=84
2)
у:1 5/31=7 3/4:1/3
у:36/31=31/4:1/3
1/3•у=36/31•31/4
1/3•у=9
у=9:1/3
у=9•3
у=27