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Y = Cantidad de Refrescos Chicos
X + Y = 296 (1)
Pero: X = 3Y
Reemplazando en (1)
3Y + Y = 296
4Y = 296
Y = 74 Refrescos
X = 3Y
X = 3(74)
X = 222 Refrescos
Rta:
Se vendieron 74 Refrescos Medianos
Se vendieron 222 Refrescos Chicos