若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若变量x,y满足约束条件{x>=-1;y>=x;3x+2y
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y
若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=?怎样算出2x-3y=0或3x+2y=0 当2x-3y
若x,y满足条件2x-y≥0,2x+3y≤8,y≥0,则z=x+3y的最大值为
若二元一次方程 1/3x-1/2y=1的解也满足3x-y+1=0,则x-y/x+y=?
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2
变量x,y满足x-2y=0,x
设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y