(x-1)/6-(x+2)/3=(x-1)/2+1x-1-2(x+2)=3(x-1)+6x-1-2x-4=3x-3+63x+1=-5-34x=-8x=-2
（6分之x-1）-（3分之x+2）=（2分之x-1）+1x-1-2（x+2）=3（x-1）+6x-1-2x-4=3x-3+64x=-8x=-2
