若x.y满足|x-2|+|y+1|=0,且2b+3x=2y+b+7,求b的值

若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2= 若实数x,y满足x-y+1》=0,x+y>=0,x 若实数x,y满足x-y+1>=0,x+y>=0,x 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 变量x,y满足x-2y=0,x 若关于x,y的二元一次方程组x+2y=m-1,2x+y=m+1的解x,y满足x>0,y 若关于x,y的二元一次方程组x+2y=m-1,2x+y=m+1的解x,y满足x>0,y 若关于x y的二元一次方程组2x+y=2m-1 x+2y=m满足x+y>0和x-y 若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大值是多少 若实数x,y满足不等式组x>=0 ,y>=0,x+2y 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若x.y满足条件2x+y-12=0,x-4y+10 若正整数X,Y满足2X+Y--XY=0,求X+Y的最小值 方程组{ X+Y=1 X-Y=2a }的解满足 {x>0 y 已知实数x,y满足y=|x-1|若x+2y 设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y