1/3 (2х+1)+2 (1-х)=3 1/3
((1/3*2х) +1/3) +(2-2х) =10/3 2/6х+2/6+2/1-2/1х=10/3 2/6х-2/1х=10/3-2/6-2/1 2/6х-12/6х=20/6-2/6-12/6 -10х=6 х=6: (-10) х=-0, 6