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Автор - aahahaljora

Сплав латуни (медь и цинк) массой 450 г содержит 35% цинка.Определите массу меди

Ответ

Автор - yataegorova
292,5 грамма
450:100=4,5г -1%
100-35=65% (медь)
65*4,5=292,5 г
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