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stiind ca x supra y= 1(3) ,determinati raporul 2x-y supra 3x+ y.

Răspuns :

x/y=1,(3)=(13-1)/9=12/9=4/3
x=4y/3
(2*4y/3-y)/(3*4y/3+y)= [(8y-3y)/3]  / [(12y+3y)/3]=
= (5y/3)  / (15y/3)= (5y/3)  / (15y/3)=1/3