解方程组 x+2y-z=0 2x-3z=1 3x-y+2z=4

解方程组：x-2y+z=-1,x+y+z=2,x+2y+3z=-1 解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7. x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组. 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z 方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z) 解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值 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 已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=—— 4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于