实数x,y满足x>=y>=1和2xx-xy-5x+y+4=0,则x+y=?

实数x、y满足x≥y≥1和2x^2-xy+5x-y+4=0,则x+y=___ 实数x，y满足x≥y≥1和2x2-xy-5x+y+4=0，则x+y=______． 实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值 实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值 实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y 若正实数x.y满足x+y=xy,则x+2y的最小值 实数XY满足X*X+Y*Y+2X-4Y+1=0,求Y/（X-4）的最大值和最小值及根号下X*X+Y*Y+2X+1的最大值 实数XY 满足2x+4y=1,则x平方+y平方最小值是 设实数x,y满足x^2+2xy+4y^2=1,则x+2y最大值 若实数xy满足（x+y+2)(x+y-1)=0,则x+y的值是