Petrolyn motor oil is a combination of natural oil and synthetic oil. it contains 2 liters of natural oil for every 3 liters of synthetic oil. if 118 liters of natural oil are used, how many liters of petrolyn oil will be made?

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.