解方程：①2x+y+z=2②x-3y-5z=6③3x+2y=0

解方程：x+y+z=0 ① 4x+2y+z=3 ② 9x+3y+z=6 ③ 解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y 解方程：①2x+y+z=2②x-3y-5z=6③3x+2y=0 解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6 解方程:x+2y+3z=8 x+3y+5z=6 解方程x-y+z=5,①2x+y-3z=15②,3x-2y+z=16③ 解关于w,x,y,z的方程w+8x+3y+5z=20①,4w+7x+2y+3z=-20②,6w+3x+8y+7z=20③ 已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x：y：z的值 ①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z- 解方程{①2x-y+z=6②-3x+2y-z=-9③x+y-2y=-1 如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 解方程x+y+2z=7① 2x+3y-z=12② 3x+2y+z=13③