3x+y−4z=135x−y+3z=5x+y−z=3
x+y−2z=52x−y+z=42x+y−3z=10
已知x+y−5z=03x−3y−z=0
已知x−3y+z=03x+3y−4z=0
x+3y+4z=3x+5y+9z=25x−9y−3z=−10
解方程组:5x−4y+4z=132x+7y−3z=193x+2y−z=18
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
2x+y+3z=383x+2y+4z=564x+y+5z=66
已知x−y+z=0x+2y−3z=0
解方程组:x−y−z=0x+y−3z=42x+3y−5z=14
解方程组2x+3y+z=6x−y+2z=−1x+2y−z=5
解方程组:3x+2y+5z=2x−2y−z=64x+2y−7z=30.
解方程组(1)x+y−z=6x−3y+2z=13x+2y−z=4