4x - 5 1\3y + 6 1\8 : z - 17 1\2=1 2\9 x = 5\9 y = 3\16 z = 7\20
4 x 5\9 - 5 1\3 x 3\16 + 6 1\8 : 7\20 - 17\1\2
4 x 5\9 = 20\9 = 2 2\9
5 1\3 x 3\16 = 16\3 x 3\16 =1
6 1\8 : 7\20 = 49\8 x 20\7 =35\2 = 17 1\2
2 2\9 - 1 =1 2\9
1 2\9 + 17 1\2 = 1 4\18 + 17 9\18 = 18 13\18
18 13\18 - 17 1\2 = 18 13\18 - 17 9\18 = 1 4\18 = 1 2\9