解方程组x-2y+4z=17 2x+y+z=3 3x+y-2z=-5

解方程组x+y=-2,y+z=-4,z+x=-12 解方程组x+y=-2,y+z=-4,z+x=-12 方程组3x+4y+z=14 x+5y+2z=17 2x+2y-z=3 解方程组 解方程组:2x+y+z=15 x+2y+z=16 x+y+z=17 解方程组：2x+y+z=-4 x+2y+z=-2 x+y+2z=3 解方程组：{2x+y+z=2 x+2y+z=4 x+y+2z=6 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 解方程组x+y/2=z+x/3=y+z/4①x+y+z=27② 解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7. 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组2x+3y-z=12,3x-y+z=4,x+y+z=6 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 方程组：{x+y-z=6,x+z=16,x-y+2z=17 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, 解三元一次方程组{x+y=2 y+z=3 z+x=4 x/2=y/3=z/4 x+y+z=18 求方程组解