当x-y/x+y等于1/2时,求y-x/x+y减去2x+2y/x-y
当x-y/x+y等于1/2时,求y-x/x+y减去2x+2y/x-y
当x+y分之x-y等于2时,求x-y分之2{x+y}-3{x+y}分之x-y的值?
1、x(x-y)(x+y)-x(x+y)^2
当x+y/x-y=1/2时,求代数式x-y/x+y-2x+2y/x-y的值
(1)(x^2/x)-y-x-y
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
已知 2x-3y/y等于2 求x-y/2x 求x-3y/2x+y
当x=1/2,y=1/3时,求代数式x-(x+y)+(x+2y)-(x+3y)+…-(x+101y)的值
当2x-y/x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的值.
当2x-y\x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的値.
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)