Răspunsuri

2014-11-13T12:23:33+02:00
Din rel 1-2a+1/6a=> -2a+1/6a=-1; amplificam cu 6a si obtinem -12a+1=-6a=> -12a-6a=-1=> -18a=-1 ; a=1/18; 2/3 din 1/a= 2/3 *18/1= 36/3