x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
已知x+y/2=y+z/3=z+x/4,且x+2y+z=12,求x-2y+z的值
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知x=y/3=z/5.且x+y-2z不等于0.求2x+3y-z/x+y-2z的值是多少
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
已知x:y:z=3:4:5,3x+2y-4z=18.求:x+y+z.
已知x/3=y/4=z/2,求x+2y-z/x+y+z=?
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
已知{x:y:z=1:2:3,x+y+z=12,求x、y、z的值