解方程组:2x+y+z=-4 x+2y+z=-2 x+y+2z=3
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解方程组:2x+y+z=-4 x+2y+z=-2 x+y+2z=3
![解方程组:2x+y+z=-4 x+2y+z=-2 x+y+2z=3](/uploads/image/z/17230118-14-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9A2x%2By%2Bz%3D-4+x%2B2y%2Bz%3D-2+x%2By%2B2z%3D3)
2x+y+z=-4 (1)
x+2y+z=-2 (2)
x+y+2z=3 (3)
(1)+(2)+(3)
4x+4y+4z=-3
x+y+z=-3/4 (4)
(1)-(2),x=-13/4
(2)-(2),y=-5/4
(3)-(2),z=15/4
x+2y+z=-2 (2)
x+y+2z=3 (3)
(1)+(2)+(3)
4x+4y+4z=-3
x+y+z=-3/4 (4)
(1)-(2),x=-13/4
(2)-(2),y=-5/4
(3)-(2),z=15/4
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
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
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,
解方程组x+2y+3z=根号(x+2y+3z+2)+4
解方程组x:y:z=2:3:4;2x+y+z=22
x/2=y/3=z/4 x+y+z=18 求方程组解
解方程组{6x=4y=3z,2x+y+z=22
解方程组:2x+3y+4z=20,x+y+z=7