解方程组 x+2y+3z=14 2x+y+z=7 3x+y+2z=11解方程组x+2y+3z=142x+y+z=73x+y+2z=11

解方程组x+2y-z=1 ,3x-3y+z=2,2x+3y+z=7和方程组x+y=-14,y+z=-7,x+z=19 方程组3x+4y+z=14 x+5y+2z=17 2x+2y-z=3 解方程组 解三元一次方程组x+z=y,7z=x+y+2,x+y+z=14 解方程组：2x+y+z=-4 x+2y+z=-2 x+y+2z=3 解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3 解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=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-3Z=1 Y+Z-3X=2 Z+X-3Y=3 3x-y+z=3,2x+3y-z=12,x+y+z=6解方程组 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{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 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.