解方程组:3x−y+2z=32x+y−3z=11x+y+z=12
解方程组:3x−y+2z=32x+y−3z=11x+y+z=12
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:5x−4y+4z=132x+7y−3z=193x+2y−z=18
解方程组:x−43=y+14=z+25x−2y+3z=30
解方程组:x−y−z=0x+y−3z=42x+3y−5z=14
解方程组:5x+4y+z=03x+y−4z=11x+y+z=−2
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
己知x,y,z,t满足方程组x+y+z=62x−z+t=−2
x+y−2z=52x−y+z=42x+y−3z=10