[ 4x + 5 ] ; 13 = 8\9
4\13x + 5\13 = 8\9
4\13 x = 8\9 - 5\13 = 104\117 - 45\117 = 59\117 4\13x + 5\13 = 8\9
x = 59\117 ; 4\13 = 59\117 x 13\4 = 59\36 = 1 23\36
x = 1 23\36
[4 x 1 23\36 + 5 ]; 13=8\9 1 23\36 = 59\36-проверка
4 x 59\36 + 5 = 59\9 + 5 = 6 5\9 + 5 = 11 5\9
11 5\9 ; 13 =104\9 x 1\13 = 8\9 8\9 = 8\9