(1 7/18-1/2x)+5/9=17/18
(17/18-1/2х)+5/9=17/18 17/18-1/2х=17/18-5/9 17/18-1/2х=7/18 -1/2х=7/18-17/18 -1/2х=-10/18 х=-10/18:-1/2 х=5/18 ответ:5/18