Ok so I need help with three problems I almost have one of them solved but I can’t remember if you divide all the numbers or not and I can’t figure the other two out

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.