6(5/6x-1целая 1/3)=5
С решением уровнение

6 * (5/6х - 1 1/3) = 56 * 5/6х - 6 * 1 1/3 = 55х - 6 * 4/3 = 55х - 8 = 55х = 5 + 85х = 13х = 13 : 5х = 13/5 = 2 3/5 = 2,6