On weekdays , a movie theater charges different rates for adults and children. If 3 adults and 2 children go for a movie on a weekday, the total cost of the tickets is $31. If 2 adults and 3 children go on a weekday the total cost of the tickets is 29$ . If a group of adults and 6 children go to the movie theatre on a weekday and pay $58 for tickets , how many adults are in this group ?