3x-y/2=x-y/5
3x-y/2-x-y/5=0
aducem la acelasi numitor amplificam prima cu 5 si a doua cu 2
15x-5y/10-2x-2y/10=0
15x-5y-2x-2y/10=0
13x-7y/10=0 inmultim cu 10 prin metoda balantei
13x-7y=0
13x=7y
x=7y/13
doar atat daca stiai cat e y sau x era un raspuns concret
