已知1/x-1/y=3,则5x+3y-5y/x-2xy-y的值

已知x,y满足x+3y=5,3x+y=-1,则x-y=? 已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy) 1 已知1/X+1/Y=1/X+Y 则 Y/X+X/Y=2 已知1/X-1/Y=5,则3X+5XY-3Y/X-3XY-Y= 已知1/x-1/y=3,则5x+3y-5y/x-2xy-y的值 已知x/1-y/1=3,则5x+xy-5y/x+2y-y的值为 已知x-y=-3y+5,则式子x+2y-1的值是? 已知x-y=1,求x平方-y平方+3x-5y的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知3X=5Y,则X:Y= 已知1/x-1/y=-3,则x+5xy-y/3x-2xy-3y= 已知1/x-1/y=3,则(5x+xy-5y)/(x-xy-y) =9= 已知1/X-1/Y=3 则(5X+XY-5Y)/(X-XY-Y)=? 已知1/x=3+1/y,则(2x-5xy-2y)/(y+3xy-x)=_______. 已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 已知1/x-1/y=3,则5x+xy-5y/x-xy-y等于 已知1/x-1/y=3,则5x+xy-5y/x-xy-y的值为? 已知1/x-1/y=-3,则5x+xy-5y/x-xy-y的值为