х+1/8(х-4/5(х+7/9))=(2х-1)/6

х+1/8(х-4/5(х+7/9))=(2х-1)/6x+1/8(x-4/5x-28/45)=(2x-1)/6x+1/8x-1/10x-7/90=(2x-1)/61 10/80x-8/80x-7/90=(2x-1)/646/45x-7/90=(2x-1)/6|*9092x-7=30x-1592x-30x=-15+762x=-8|:62x=-4/31