解方程组:x+y=2y+z=4z+x=6
解方程组(1)x+y−z=6x−3y+2z=13x+2y−z=4
解方程组x−4y=0x+2y+5z=22x+y+z=12
解方程组:x+y+z=12x+2y+5z=22x=4y
解方程组:x+y=3y+z=5z+x=4
解方程组2x+3y+z=6x−y+2z=−1x+2y−z=5
解方程组:x+2y+3z=62x+3y+z=63x+y+2z=6
解方程组:5x−4y+4z=132x+7y−3z=193x+2y−z=18
解方程组:5x+4y+z=03x+y−4z=11x+y+z=−2
解方程组:x−2y+4z=172x+y+z=33x+y−2z=−5
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组x:y=1:5y:z=2:3x+y+z=27.