(х-1целая1/3):1целая 5/12=4/51 очень срочно!
(x - 1 1/3) : 1 5/12 = 4/51 x - 1 1/3 = 17/12 * 4/51 x = 4/3 + 1/9 x = 13/9 x = 1 4/9