若|3/2x-6|+|0.2+2y|=0,则x=1/8

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 若2X+3Y-1=Y-X-8=X+6则2X+Y= 若2x+3y-1=y-x-8=x+6，则2x-y=______． 若X+6=Y-X-8=2X-3Y-1,则3X-Y=? 设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于 2x+3y-1=y-x-8=x+6,则x= 若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 若｜y+5｜+(5x+1)^2=0,求-3(2x-y)-｛7x-[6x+2y-(10x-8y)]-x-2(3x-4y)｝ 若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )