已知x=(16/3)^0,y=-3,求[(2x-y)(-y-2y)-3x^2y-(y^2-4x^2)]/2x的值

已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知4x-2y=0,求x-y/3x+2y的值 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 已知3x-4y/2x+y=1/2 求x/y的值 已知|2x-3y|+|3x-y-1|=0,求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^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/y=3/4,求2x-y/x+y的值. 已知x-3y=0,求2x+y/x-2xy+y乘(x-y)的值