题目是这样的话:1/2{1/2【1/2(x/2-3)-3】-3}-3=0
1/2{1/2【1/2(x/2-3)-3】-3}=3
1/2[(1/2(x/2-3)-3]-3=6
1/2[(1/2(x/2-3)-3]=9
1/2(x/2-3)-3=18
1/2(x/2-3)=21
x/2-3=42
x/2=45
x=90
题目是这样的话:1/2{1/2【1/2(x/2-3)-3】-3}-3=0
1/2{1/2【1/2(x/2-3)-3】-3}=3
1/2[(1/2(x/2-3)-3]-3=6
1/2[(1/2(x/2-3)-3]=9
1/2(x/2-3)-3=18
1/2(x/2-3)=21
x/2-3=42
x/2=45
x=90