Ответ:
8/9 = 72/y ;
8y = 72·9 ;
8y = 648 ;
y = 648 : 8 ;
y = 81 .
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Ответ:
8/9 = 72/y ;
8y = 72·9 ;
8y = 648 ;
y = 648 : 8 ;
y = 81 .