2|X-Y|+√2Y+Z+Z²-Z+1/4=0求X+Y+Z的值
已知X²+y²+z²—2x+4x-6z+14=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满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的
已知-3y=x+2z,求x²-9y²+4z²+4xz的值
已知x,y,z满足条件(x-2y-4)²+(2y+z)²+丨x-4y+z丨=0,求3x+y-z的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,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.
1.若/x-3/+(2x-y)²+根号y+z=0,求x,y,z的值.
若/x+2y-5/+(2y+3z-13)²+(3z+x-10)²=0,试求x,y,z的值.