解方程组:x/2=y/3=z/5 x-2y+3z=22
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组:{x/2=y/3=z/4 2x+y+z=22
解方程组{6x=4y=3z,2x+y+z=22
解方程组x:y:z=2:3:4;2x+y+z=22
x:y:z=2:3:5解方程组 2x+3y-z=16
解方程组:x+3y=5.y-2z=5.x+z=5
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.
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.