everysaturday workout nation holds a 45 minute aerobics class. weekday aerobics classes last 30 mins . the number of weekdays…

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everysaturday workout nation holds a 45 minute aerobics class. weekday aerobics classes last 30 mins . the number of weekdays classes varies. last week there were a total of 165 minutes of aerobics classes avaliable. how many weekdays aerobics classes were there