具体的文字说明我就不写了啊 x/2 x2=(2x-1) x2x=2xx2-1x2 x=4x-2x+2=4x-2+2 x+2=4xx+2-x=4x-x2=3x x=2/3 5-7y+7y=4y+16+7y 5=11y+165-16=11y+16-16 -11=11...