Предмет: Математика, автор: korkesha2008

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Приложения:

Ответы

Автор ответа: niktory

1

Ответ:

40% меди в полученном сплаве.

Пошаговое объяснение:

200+300=500 г получилось в сплаве

500 г - 100%

200 г - х%

х = 200*100/500

х=40%

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