1.2/3x+1/2x-8x=3
7/6x-8x=3
-41/6x=3
x=-18/41
2.1/2x-1/2=2-1/5x-2/5
1/2x+1/5x=2-2/5+1/2
7/10x=21/10
x=3
3.x=-1