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Daca x/y= 5/3 calculati, folosind proportii derivate, valorile rapoartelor.
A. 2x+3y /3x +2y
B. 5x-4y/4x-5y


Răspuns :

x/y=5/3

A.(2x+3y)/(3x+2y)
(10+9)/(15+6)
19/21
B. (5x-4y)/(4x-5y)
(25-12)/(20-15)
13/5

Cred ca asa e