3x(x-1)=2(x-1)
3x(x-1)-2(x-1)=0
(x-1)(3x-2)=0
x=1或x=2/3
(2x-1)²-(3-x)²=0
[(2x-1)+(3-x)][(2x-1)-(3-x)]=0
(x+2)(3x-4)=0
x=-2或x=4/3