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A - B = 13
De la segunda igualdad:
A - B = 13
A = 13 + B
Reemplazando en la primera igualdad:
(13 + B) + B = 41
13 + 2B = 41
2B = 28
B = 14
Entonces: A = 13 + 14 = 27
RESPUESTA: El producto es 27×14 = 378