已知x-2y=2014,求 [(3x+2y)(3x-2y)-(x+2y)×(5x-2y)]÷8x的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值
已知x=3分之1,y=二分之一,求代数式x-(x+y)+(x+2y)-(x+3y)+...-(x+13y)的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
已知x-y/x=x/x-2y(y不等于0),求x:y的值
已知x-2y=2014,求 [(3x+2y)(3x-2y)-(x+2y)×(5x-2y)]÷8x的值
已知3x-2y/x+y=5/3求x;y的值
已知xy=2,x-y=3,求(x+y)(x-y)-y^2-(6x^2y-2xy^2)/2y的值.