Adrian is a songwriter who collects royalties on his songs whenever they are
played in a commercial or a movie. Adrian will earn $40 every time one of his
songs is played in a commercial and he will earn $130 every time one of his
songs is played in a movie. Adrian earned a total of $1010 in royalties on 14
commercials and movies. Write a system of equations that could be used to
determine the number of commercials and the number of movies on which
Adrian's songs were played. Define the variables that you use to write the
system.