Naomi is a songwriter who collects royalties on her songs whenever they are played in a commercial or a movie. Naomi will earn $20 every time one of her songs is played in a commercial and she earn $100 every time one of her songs is played in a movie. Naomi's songs were played on 3 more commercials than movies, and her total earnings on the royalties from all commercials and movies was $300. Graphically solve a system of equations in order to determine the number of commercials, and x the number of movies , y , on which Naomi's songs were played .