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alyvolkonskaya394638
01.06.2020 05:54

В результате чего может произойти обморожение Кожного покрова у человека?

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Ответ:
Х - грамм в одной части
7х- олово
3х - медь
7х-3х=60
4х=60
х=15
Меди - 3 Х15=45 г, Олова - 7 Х15=105 г, цинка  - 4Х15=60 г45+105+60=210 г - масса сплав.с тебя лайк)))
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