已知x+y+z=7,1/(x-1)+1/(y-2)+1/(z-3)=0求(x-1)^2+(y-2)^2+(z-3)^2的
已知{x:y:z=1:2:3,x+y+z=12,求x、y、z的值
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知x:y:z=1:2:3,x+y+z=24,求x,y,z
已知x:y:z=4:5:7,求:(1)2x+3y+z/5z; (2)x+y/y+z.
已知X、Y、Z满足2X-Y+4Z=8(1);X-2Y-Z=7(2)求X-Y-Z的值
1 已知想x,y,z满足2x-y+4z=8,x-2y-z=7,求x-y+z的值
已知x,y,z满足x+y+2z=1,x²+y²+6z+1.5=0,求x,y,z的值
1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值.
已知x+y+z=7,1/(x-1)+1/(y-2)+1/(z-3)=0求(x-1)^2+(y-2)^2+(z-3)^2的
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
已知有理数x,y,z,且|x-3|+2|y+1|+7(2z+1)2=0,求x+y+z的相反数的倒数.
已知x+y-1的绝对值+x+2y+z的和的平方+x-3z的绝对值=0,求代数式x-y+z的值.