Предмет: Математика, автор: sadoiva

Рис имеет 8% белков и жира вместе.Причём белков в 7 раз больше чем жира.Сколько грамм белков имеет 900 г риса?

Ответы

Автор ответа: nafanya2014

900 :100·8=72 г белков и жира
Пусть х г жира, тогда 7х г белков
х+7х=72
8х=72
х=9
7х=7·9=63 г белков
Ответ. 63 г белков

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