(x+y)/y=8/3则x/y=__ y/x-y=___
若5x+3y=3x+4y=x+2y+6,则x+y=___
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
int x=2,y; y=(x++)*5;运行后x=_____ __ y=____ ___.
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-2y+3,试用含x的代数式表示y,则y= ___ .
已知3x+2y=5,则8^x*4^y=___
求y'=y/(y-x)
) y=cos(x-y)
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y