若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值

若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 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= 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 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x,y 满足条件{x>=1 y>=1 x+y-3 已知实数x,y满足y=|x-1|若x+2y 已知X和Y满足3X+4Y=2,X-Y-1/7 若x,y为正整数,且满足3x(x+y)-y(x+y)=7,求x,y 若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=? 若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y 方程组2x+y=1-m...x+2y=2中,若未知数x,y满足x+y 若实数x,y满足不等式x-y>=-1,x+y>=1,3x-y 若实数x,y满足不等式x-y>=-1,x+y>=1,3x-y