过程:两边同乘以6:3X-(5X+12)=6+2(2X-4)3X-5X-12=6+4X-8-8X=10X=-4/5
x/2-(5x+12)/6=1+(2x-4)/3x/2-5x/6+2=1+2x/3-4/3(3/6-5/6-4/6)x=1-4/3-2-x=-7/3x=7/3