3x＋2y＝2,y=?

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 设x,y满足x＋3y＋|3x－y|＝19,2x＋y＝6则X= Y= (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 3x＋2y＝2,y=? (x+y)(2x-3y)=? 3x(2x＋y)－2x(x-y),其中x＝1,y=1/5 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 计算：y(x-y)^2+(y-x)^3=? y'=(2x+y)/(3x-y)微分方程通解 12y(x-y)^2-8(x-y)^3=? 3x+y=2 -y/x+y=123x+y=2 （-y/x）+y=12 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 方程组2分之x+y+3分之x-y＝6,2（x+y)-3x+3y=24 {(x+2)^2-(y-3)^2=(x+y)(x-y) {x-3y=2