Carter's song played on 7 commercials and 5 movies.
Step-by-step explanation:
Earning per commercial = $50
Earning per movie = $130
Total earned = $1000
Total commercial and movies = 12
Let,
x be the number of commercials
y be the number of movies
According to given statement;
x+y=12 Eqn 1
50x+130y=1000 Eqn 2
From Eqn 1
x=12-y Eqn 3
Putting value of x from Eqn 3 in Eqn 2
Dividing both sides by 80
Putting y=5 in Eqn 1
Carter's song played on 7 commercials and 5 movies.
Keywords: linear equation, substitution method
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