Janice is looking for a cheap airfare and she will be traveling with a lot of luggage. She has to choose between two airlines. Airline A charges $180 for a ticket and $25 per piece of luggage. Airline B charges $110 for a ticket and $35 per piece of luggage. She decides that, given her number of suitcases, the two airlines cost the same. How many pieces of luggage does she have? Enter your answer as a whole number.
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