Предмет: Математика, автор: blyshchakoksanal21

Сплав цинку і міді містить на 20 % міді більше ніж цинку. Після
видалення із нього 30% цинку і 25 % міді його маса стала дорівнювати
80г. Знайдіть (у грамах) початкову масу сплаву.
СРОЧНО!!!!!!!!!!!!!!!!!!!!!!
ДАЮ 10 БАЛЛОВ!!!!!!!!!!

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Автор ответа: lidiasaraa3

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