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Padre 4x - 6 4x
hijo 7(x-6) x
Resolviendo
4x - 6 = 7(x-6)
4x - 6 = 7x - 42
42 - 6 = 7x - 4x
36 = 3x
36 / 3 = x
12 = x
la edad del hijo es 12
La edad del padre es 48