1/2【x-1/2(x-1)】=2/3(x-1)1/2(x-1/2x+1/2)=2/3x-2/31/2(1/2x+1/2)=2/3x-3/31/4x+1/4=2/3x-2/32/3x-1/4x=1/4+2/35/12x=11/12x=11/5
1/2【x-1/2(x-1】=2/3(x-1) =11/6