解方程组2x+3y+z=6x−y+2z=−1x+2y−z=5
解方程组2x+3y+z=6x−y+2z=−1x+2y−z=5
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:3x+2y+5z=2x−2y−z=64x+2y−7z=30.
解方程组:5x−4y+4z=132x+7y−3z=193x+2y−z=18
己知x,y,z,t满足方程组x+y+z=62x−z+t=−2
解方程组:x−2y+4z=172x+y+z=33x+y−2z=−5
解方程组:3x−y+2z=32x+y−3z=11x+y+z=12
解方程组:5x+4y+z=03x+y−4z=11x+y+z=−2
解方程组:x−43=y+14=z+25x−2y+3z=30
已知方程组x:y:z=1:2:7 2x−y+3z=42
解方程组x:y=1:5y:z=2:3x+y+z=27.