已知x+3y=0,求x^3+3x^2y-2x-6y的值

已知|3x-y|+|x+y|=0,求x-y除以x*y的值. 已知|2x-3y|+|3x-y-1|=0,求x,y的值. 已知4x-2y=0,求x-y/3x+2y的值 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. 已知x-3y=0,求（2x+y)/(x^2-2xy+y^2)*(x-y)的值 已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值. 已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值 已知x-3y=0,求2x+y/x-2xy+y乘(x-y)的值 已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值 已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方 已知x+3y=0,求x^3+3x^2y-2x-6y的值 已知x-3y=0,求[（2x+6)/(x^2-2xy+y^2)]*(x-y)的值.