A fish wants to swim 25 km upstream. he swims 7 km in the day and floats back 5 km at night. how many days will it take for the fish to reach 25 km upstream?
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A fish wants to swim 25 km upstream. he swims 7 km in the day and floats back 5 km at night. how many days will it take for the fish to reach 25 km upstream?