按步骤来撒。(X/2)=1+(2X-4/3)+(5X+11/6) (X/2)=7X+(3/2)-6.5X =1.5X=-3/13
(X/2)-(5X+11/6)=1+(2X-4/3)x/2-5x-11/6=1+2x-4/3-x/2-2x=-1/3+11/6-5x/2=3/2-5x=3x=-3/5