Answer:
B = 900 Libros
A = 2700 Libros
C = 1800 Libros
Explanation:
A = 3B
2B = C
A + B + C = 5400
3B + B + 2B = 5400
6B = 5400
B = 5400 / 6
A = 3(900)
C = 2B
C = 2(900)
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