方程组x+y=3x+z=1y+z=2
解方程组x:y=1:5y:z=2:3x+y+z=27.
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:2x-y+z=6.-3x+2y-z=-9.x+y-2z=-1求解
已知方程组x:y:z=1:2:7 2x−y+3z=42
解方程组:x+y=3y+z=5z+x=4
解方程组:2X=3Y Y=2Z X+2Y+Z=16
己知x,y,z,t满足方程组x+y+z=62x−z+t=−2
已知方程组{2x-y+z=3,3x+4y-z=8,x+y-2z=-3,
解方程组:3x+2y+5z=2x−2y−z=64x+2y−7z=30.
解方程组:x+2y+3z=62x+3y+z=63x+y+2z=6
解方程组:3x−y+2z=32x+y−3z=11x+y+z=12