5x-y=51,x-y=3,则x= ,y=

（x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy) 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 若3x=5y,则x:y=________,(x-y):y=______ 5x-y=51,x-y=3,则x= ,y= 化简 x / y(x+y) - y / x(x+y) = (x+y)/y=8/3则x/y=__ y/x-y=___ (x+y)/y=8/3则x/y=__ y/x-y=___ 推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做. 若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) 2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51 x+y／y=5／4,则x／y=---------------- 如果x/y=3则x+y/y （5x-6y)(x+y)=0(x不等于y),则y/x= 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11