若x:y=2:3,则(x+y):y=
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若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/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
若2x=3y,则(x*x+y*y)/x*x=?
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
若x+2y分之x-y=3,则代数式x+2y分之2(x-y)-3(x-y)分之x+2y的值为
已知方程组{(X+Y)-3(X-Y)=7,2(X+Y)+(X-Y)=-7}则(X+Y)(X-Y)=
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
若|x-3|+(y+2)=0,则(x-y+4xy/x-y)(x+y-4xy/x+y)的值是
若|x-3|+(y+2)²=0,则(x-y+4xy/x-y)(x+y-4xy/x+y)的值是
若x,y互为相反数(y≠0),则2x+5+2y+3x/y=____
若3x=7y,则y比x= ,x:(x+y)=
若f(x+y,y/x)=x^2-y^2,则F(X,Y)=
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)