Respuesta :

I hope this helps you
Ver imagen Аноним
if Jack' age = J ; Purcella's age = P
and also , J = 12 + P ; P + J = 156

Then..

P + ( 12 + P ) = 156
2P = 144
P = 72 years old
J = 12 + 72 = 84 years old

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