July 2022 0 6 Report
К амальгаме золота (сплав ртути с золотом), содержащей 19 кг золота, добавили 5 кг ртути, после чего процент содержания ртути в амальгаме увеличился на 19.
Найдите массу (в кг) первоначального сплава.
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