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daca 5+8y supra 5x+12y egal cu 3supra4, atunci x supra y este?



Răspuns :

daca 5+8y/ 5x+12y= 3/4  [ inmultim pe diagonala] => 4*(5+8y)=3*(5x+12y)=>20+32y=15x+36y=>36y-32y=20-15x=4y=5x=>4/5