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Aflati valoare raportului numerelor x si y daca:
b)6x-2y/12x+5y=1/7
d)6x+2y / 5x+3y = 1,(1)


Răspuns :

b)(6x-2y)/(12x+5y)=1/7
42x-14y=12x+5y
30x=19y
x/y=19/30

d)(6x+2y) / (5x+3y) = 1,(1)
1,(1)=(11-1)/9=10/9
(6x+2y) / (5x+3y) =10/9
54x+18y=50x+30y
4x=12y
x=3y
x/y=3