Mathematics, 20.04.2021 14:00 TJxx187

If 4 litres of laboratory alcohol is 80% pure (80% alcohol, 20% water), how many litres of water must be added so that the resulting mixture will contain 30%?

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If 4 litres of laboratory alcohol is 80% pure (80% alcohol, 20% water), how many litres of water m...

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