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Hijo = m
Resolvemos :
m + 3 (m + 5) = 43
m + 3m + 15 = 43
4m + 15 = 43
4m = 43 - 15
4m = 28
m = 28/4
m = 7
3 (m + 5)
3 (7 + 5)
3 (12)
36
Solución :
El padre tiene = 36 años
El hijo tiene = 7 años