若分式x-y/2x-y =-1.则x与y的关系是

若分式x-y/2x-y =-1.则x与y的关系是 若分式2x-y分之x-y=-1,则x与y的关系是 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 分式的通分：2xy/(x+y)^2与x/(x^2+y^2)分式通分, 若y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)= 若分式xy/x+y中的x,y都扩大2倍,则分式的值 若分式（x*x*y*y)/(2x-y)中x与y同时扩大原来2倍,分式值为1天完成 分式计算(x-y-4y^2/x-y)(x+y-4x^2/x+y)=? 若x²+y²+6x-2y+10=0 则分式x-2y/x³-4x²y+4xy²的值 若x^2+y^2-6x-2y+10=0,则分式 若2x=-y,则分式(xy)/(x²-y²)=_____ 若x/y=2则分式x²-y²/xy的值 若x/y=2,则分式x²-y²/xy的值为? 若x/y=2,则分式x²-y²/xy的值为 分式计算：x+y分之x^2-x+y=?(x+y分之x^2)-x+y=? 若1/x-1/y=3,则分式(2x+3x y-2y)/(x-2xy-y)=_____ 若x+y-2x-6y+10=0,则分式x-y／x-2xy+y的值为 若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?