4x+3y=4z 4x+y=2z 4x+4y=?
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x+y/2=z+x/3=y+z/4 x+y+z=27
x+2y=3x+2z=4y+z 求x:y:z
2x+z=10 x+y-z=4 3x-y-z=0
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)=
(x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z
x,y,z不是0.3z=4y,z=3x求(x+y):(x+z).
x/2=y/3=z/4,则x+2y-z/z=?
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
x+y=5 2x+3y-z=9 x-y+z=4
{2x+y=10 {x-y+z=4 {3x-y-z=0
3x-y+z=4,2z+3y-z=12,x+y+z=6的解
(x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ;3x+y-z=-4求x y z
化简-(-3x-y+2z)-{-x+【4x-(x-y-z)-3x+2z}
已知整数x、y、z,满足x≤y<z,且|x+y|+|y+z|+|z+x|=4,|x-y|+|y-z|+|z-x|=2,求x^2+y^2+z^2的值.
整数x、y、z满足x≤y<z|x+y|+|y+z|+|z+x|=4|x-y|+|y-z|+|z-x|=2求x²+y²+z²