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Mathematics, 23.02.2021 14:00 misstaejailicious200

The mean temperature for the first 4 days in January was -6°C. The mean temperature for the first 5 days in January was -5°C.
What was the temperature on the 5th day?

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The mean temperature for the first 4 days in January was -6°C. The mean temperature for the first 5...
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