Answer:


(2 Movies and 7 Commercials)
Explanation:
Let's represent every time Carson's songs are played in a commercial as C and in movies as M.
Set up the following equations:
(1)
(2)
Substitute equation 2 for equation 1:

Distribute:

Simplify:

Divide both sides by 140:

Substitute 2 as M back into either original equation, I will use (2):
