Х+1/8(х-4/5(х+7/9))=2х-1/6
= х + 1/8(х - 4/5х - 28/45) = 2х - 1/6 х + 1/8х - 1/10х - 7/90 = 2х - 1/6 общ. знаменатель = 360 360х + 45х - 36х - 28 = 720 - 60 360х + 45х - 36х = 720 - 60 + 28 369х = 688 х = 1целая 319/369