Răspuns :

Robertiosaid
x/5=y/2=k => x=5k ,y=2k
2k+1/4=2k+1/2 -aducem la numitor comun
2k+1=2(2k+1)
2k+1=4k+2
2k-4k=2-1
-2k=1=> k=-1/2

x=-5/2
y=-1

-5/2/5=-1/2
-5/2:5=-1/2
-5/2*1/5=-1/2
-1/2=-1/2

ID Alte intrebari