Respuesta :

Answer:12B - 12M = 36

12B + 15M = 63

Subtract one from the other:

12B + 15M = 63

-(12B - 12M = 36

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0 + 27M = 27

27M = 27

M = 1

B - M = 3 (from the original equations)

B - 1 = 3

B = 4

You bought 4 books and 1 movie.

Step-by-step explanation:

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Answer:you buy 4 books and 1 movie

Step-by-step explanation:

12x4=48 + 15(one movie)=63

:D