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В растворе содержится 40% соли. Если добавить 100 г соли, то в растворе будет содержаться 50% соли. Сколько граммов соли было в растворе первоначально?
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В растворе было 400 грамм изначально
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Автор:
belindauyf2 - 6 лет назад
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