解方程组｛x-y+z=0,4x+2y+z=3,25x+5y+z=60

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2x+3y-z=9 x+y+z=15 5方程组2x+3y-z=9 x+y+z=15 5x-4y-z=0的解, 解方程组X+Y+Z=0 4X=2Y+Z=0 Z=0 解方程组 X+Y+Z=0, 4X+2Y+Z=0, Z=2 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{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 解方程组x+y-z=0,2x+y+z=7,x-3y+z=8 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/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 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 已知x,y,z,满足方程组x-2y+z=0,7x+4y-5z=0 已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z