x-(1-x)/3=(x+2)/6-1
x-(1/3-x/3)=(x/6+1/3)-1
x-1/3+x/3=x/6+1/3-1
6(x-1/3+x/3)=6(x/6+1/3-1)
6x-2+2x=x+2-6
8x-x=2-4
7x=-2
x=-(2/7)