(x-3)分之x-(2x-6)分之1=2分之1
(2x-6)分之2x-(2x-6)分之1=2分之1
(2x-6)分之(2x-1)=2分之1
2(2x-1)=2x-6
4x-2=2x-6
4x-2x=2-6
2x=-4
x=-2