若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)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=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满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
若有理数x,y,z满足等式:(x-1)的平方+(2x-y)的平方+|3x-z|=0,求x+y+z的值
已知{x:y:z=1:2:3,x+y+z=12,求x、y、z的值
若有理数x、y、z满足等式(x-1)^2+(2x-y)^4+|x-3z|=0,求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
|X-3|+| Y-2|+|Z-1|=0,求3x+2y +Z的值
若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值?