解方程组:{3x+2y+2z=-1 4x-3y-5z=12 2x+6y+7z=-1

解方程组解方程组｛y=2x-7｛x+y+z=1｛3x-z=4 解方程组 x+y-z=6 〈1〉{x-3y+2z=1解方程组 x+y-z=6 〈1〉{x-3y+2z=1 3x+y-z=4 解方程组：2x+y+z=-4 x+2y+z=-2 x+y+2z=3 解方程组 x+y+z=2 x-2y+z=-1 x+2y+3z=-1 解方程组：x-2y+z=-1,x+y+z=2,x+2y+3z=-1 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 解方程组 :X+Y-3Z=1 Y+Z-3X=2 Z+X-3Y=3 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 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/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：x+y+z=4,x+y+2z=5,3x+y-z=6 解方程组:x:y:z=1:2:3;x+y+z=12,求,x,y,z的值 2x+y=4,x+3z=1,x+y+z=7解这个三元一次方程组 解方程组:x+2y+3z=80,x/2+y/3=z/4, 解方程组x/2=y/3=z/4 ,2x+Y+Z=22