若2x-y=8,则6-2x+y=?
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若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若x^2+y^2-6x+8y+25=0 则y/x-x/y的值是
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若f(x+y,y/x)=x^2-y^2,则F(X,Y)=
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
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
若2X+3Y-1=Y-X-8=X+6则2X+Y=
若2X+3y-1=y-x-8=x+6,则2x-y=?
若X+6=Y-X-8=2X-3Y-1,则3X-Y=?
若x+6=y+x-8=2x-3y-1,则x-y=
若X+6=Y-X-8=2X-3Y-1,则3X-Y=?
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
若2x=3y,则(x*x+y*y)/x*x=?
若5x+3y=3x+4y=x+2y+6,则x+y=___
若X+Y=8,(X-Y)^2=4,则X^2+Y^2=
若【x+y=5,2x+y=8】,则x+2y=