已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?
已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?
已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值
已知实数x满足x^2+2xy+y^2-(x+y)-6=0则x+y的值
已知实数xy满足x/y=x-y,且y>1,则实数x的取值范围是
已知实数x,y满足方程x*x+y*y-4x+1=0.求y-x的最大值
已知实数x,y满足下面关系式:y=x
已知X,Y为实数,且满足2X^2+4XY+4Y^2+8X+12Y+10=0,求x+y的值.
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知正实数x,y满足x+2y=4,则1x+1y
已知实数x,y满足x2+3y2+6x-12y+21=0,求x,y的值
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
已知实数x,y满足x²+4y²=4x,求x+y的取值范围