x/4=(x-2)/5
5x=4x-8
x=-8
x/2-(x-1)/4=0
2x-x+1=0
x+1=0
x=-1
1+(x-1)/3=x/6
6+2x-2=x
4+x=0
x=-4
x/2-(x-1)/6=1/3
3x-x+1=2
2x=1
x=1/2