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daca z + y =9 iar x =137 calculeaza x:y + z:z .
Va rog ! Urgent ! Dau coroana !


Răspuns :

y=9-z

x:y+z:z = x:(9-z) + z:z = [xz+z(9-z)]:[(9-z)z] = (x+9-z):(9-z) = (148-z):(9-z)