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Sea la edad de Raul = y
Se dice que:
1/2(y+5) = x
Ademas que:
1/2(x+y) + 5 = y
Resolviendo:
1/2( 1/2(y+5) + y) + 5 = y
2y = 3y/2 + 15/2
4y = 3y + 15
y= 15
Si y= 15
Entonces x= 1/2(y+5) = 1/2(15+5) = 10
Edades:
Raul = 15, Julio = 10