1075328645
2x-1/2[x-1/2(x-1)]=2/3(x-1)
2x-1/2[x-1/2x+1/2]=2/3x-2/3
2x-1/2[1/2x+1/2]=2/3x-2/3
2x-1/4x-1/4=2/3x-2/3
7/4x-1/4=2/3x-2/3
7/4x-2/3x=1/4-2/3
13/12x=-5/12
x=(-5/12)÷(13/12)
x=-5/13
2x-1/2[x-1/2（x-1）]=2/3（x-1）怎么算
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