解方程 2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
x+2y+4z=17 2x+y+z=7 3x+y+2z=11
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
解方程 2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4
解方程:2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4(过程)
2x+4y+3z=9 3x-2y+5z=11 5x-6y+7z=13 这个方程怎么解?
x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=?
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
解方程组1、4x+9y=12,3y-2z=1,2x+6z=32、3x-y+2z=3,2x+y-3z=11,x+y+z=1