解方程组,｛x+y+3=-6,2x-y+3z=-9.3x+2y-z=-4

解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 解三元一次方程组：x+y+z=6,y-z=4,x-y-2z=3, 解方程组{6x=4y=3z,2x+y+z=22 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 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 解方程组2x=3y=6z,x+2y+z=16 解方程组：{x/2=y/3=z/4 2x+y+z=22 解方程组:x+2y+3z=80,x/2+y/3=z/4,