(2+1/3-5/6)/3=x/2
(12/6+2/6-5/6)/3=x/2
(14/6-5/6)/3=x/2
9/6/3=x/2
2/3/3=x/2
3x=2×2/3
3x=4/3
x=4/3×1/3
x=4/9
