Відповіді до завдань 802 - 900 » 841

1) х/39 + 14/39 + 5/39 = 28/39 , х/39 + 19/39 = 28/39 , х/39 = 28/39 - 19/39 , х/39 = 9/39 , х = 9; 2) х/53 -(17/53 + 8/53)= 27/53 , х/53 - 25/53 = 27/53 , х/53 = 27/53 + 25/53 , х/53 = 52/53 , х = 52; 3) х/89 + (39/89 - 17/89)= 58/89 , х/89 + 22/89 = 58/89 , х/89 = 58/89 - 22/89 , х/89 = 36/89 , х = 36;