解方程:4x+4y+4z-12=x^2+y^2+z^2
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
3x-y+z=4 2x+2y-z=12 x+y+z=16 这个方程咋解
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解下列方程:x-4y=0,x+2y+5z=22,x+y+z=12
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
(x+y)除以2=(y+z)除以3=(z+y)除以4,x+y+z=27这个方程怎么解啊.
1.x+y=16,y+z=12,z+x=102.3x-y+z=4,2x+3y-z=12,x+y+z=63.x+y+z=6
3x-5y-6z=4,2x-2y-3z=5 2x-3y-4z=4 解方程,
解方程 2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4