Provide an appropriate response.
A bookstore charges $78 for two videos and three books. Let v be the cost of each video and let b be the cost of each book. Write an equation in two variables for the total charge.
A. 3b = 2v
B. 3v + 2b = 78
C. 2v + 3b = 78
D. v + b = 78
Answer: C
Mathematics
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