Предмет: Математика, автор: nazdetdom01

Для сплава меди, цинка и олова нужно 204/5 кг меди, 5кг цинка и некоторое количество олова. Известно, что олово составляет 4/9 общей массы сплава. Какова общая масса сплава? Ответ должен получиться 2061/25 кг

Ответы

Автор ответа: Senpoliya

х кг - общая масса сплава
4/9х кг - масса олова

204/5 + 5 + 4/9х = х
4/9х - 9/9х = -204/5 - 25/5
-5/9х = -229/5
х = -229/5 : (-5/9)
х = 229/5 * 9/5
х = 2061/25 кг - общая масса сплава

Автор ответа: Senpoliya

Nazdetdom01, спасибо за лучший :)

Автор ответа: nazdetdom01

Не за что)

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