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p+9 = 1+{2*(h+9)}
p = 4h-16+4 = 4h-12
4h-12+9 = 1+2h+18
4h-2h = 1+18+12-9
2h = 22
h = 22/2
h = 11
p = 4h-12 = 4*11 - 12 = 44-12 = 32
Respuesta:
Padre: 32 años
Hijo: 11 años