1/2{1/2[1/2(1/2x-3)-3]-3}=11/2[1/2(1/2x-3)-3]-3=21/2[1/2(1/2x-3)-3]=51/2(1/2x-3)-3=101/2(1/2x-3)=131/2x-3=261/2x=29x=58
