来自蔡国洋的问题
（急!）解三元一次的题,①x+y+z=1x+3y+7z=2x+5y+19z=4②x+2y+3z=1x=y+12x+3y+5z=2③x+y+z=1x-y-z-3=0x+2y+3z=-4④3x+4z=235x+y=86x+y+8z=49
（急!）解三元一次的题,
①x+y+z=1x+3y+7z=2x+5y+19z=4
②x+2y+3z=1x=y+12x+3y+5z=2
③x+y+z=1x-y-z-3=0x+2y+3z=-4
④3x+4z=235x+y=86x+y+8z=49
1回答
2020-05-02 16:08