Предмет: Математика, автор: каренмн

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Автор ответа: MashaErm

28%=0,28
Пусть трехкомнатные квартиры-х, тогда двухкомнатные 1,7х
1)0,28*300=84(квартиры) однокомнатные
2)1,7х+x=300-84
2,7x=216
x=216:2,7
x=80(квартир) трехкомнатные
3)80*1,7=136(квартир) двухкомнатные

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