若2y+3x=2008,求代数式2(3x-2y)-(x-y)+(-x+9y)=_____?
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x/y=3/2求代数式4x-9y/2x+3y
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
若2x+3y=2004,则代数式2(3x-2y)-(x-y)+(-x+9y)=...
若2x+y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
当2x-y/x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的值.
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y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=2,求代数式2(x-y)/x+y + x+y/3(x-y)的值 快啊.
已知x-y除以x+y=3,求代数式x+y分之2(x-y)-3(x-y)分之x+y的值.