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9k=27
k=3
EDADES:
2K=2*3=6
3K=3*3=9
4K=4*3=12
LA B
x=2K
y=3K
z=4K
reemplazamos
x + y + z =27
2K + 3K + 4K = 27
9K = 27
K= 3
hallamos las edades
X= 2K = 2(3)= 6
Y= 3K = 3(3)= 9
Z= 4K = 4(3)= 12
Rpta.: 6, 9 y 12