Answer:
Pedro age = 54 ; Jorge age = 18
Step-by-step explanation:
Pedro age = P
Jorge age = J
3J = P
J + P = 72
we have to substitute the value of P in the second equation
J + 3J = 72
we have solve the equation
4J = 72
J = 18
we have to subistute this value in the first equation
3*18 = P
P = 54
