3 children build a giant sandcastle in 4 hours, how long will it take... a)1 child, b)5 children

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.