1. during the summer, matthew and devan started their own business mowing lawns for people in the lake fore starting any work, matthew spends $15 to ill up the gas tank for the lawnmower. the gree that each person will earn the same amount after matthew is reimbursed the money he spent gas alter a week of work, the boys earn a total of $243. matthew filled up the gas tank just once. how much did each boy earn?