|x-8y|+2(4y-1)²+3|8z-3x|=0由非负性x-8y=0......(1)4y-1=0......(2)8z-3x=0......(3)由(2)得y=0.25代入(1)得x-2=0x=2代入(3)得8z-6=0z=0.75解得x=2y=0.25z=0.75则x+y+z=3
