作业帮3x+y-4z=1,2x+y-4z=1,5x+3y-3z=1/2
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 15:49:50
3x+y-4z=1,2x+y-4z=1,5x+3y-3z=1/2
3x+y-4z=1,2x+y-4z=1,5x+3y-3z=1/2
3x+y-4z=1,2x+y-4z=1,5x+3y-3z=1/2
因为3x+y-4z=1,2x+y-4z=1所以3x+y-4z=2x+y-4z 3x-2x=y-y-4z+4z x=0
因为x=0 且3x+y-4z=1 所以 y-4z=1 y=4z+1
又因为5x+3y-3z=1/2 所以 3y-3z=1/2 (6y-6z)/2=1/2 6y-6z=1 6(4z+1)-6z=1 24z-6z+6=1
18z=-5 z= -5/18 代入y=4z+1则 y=4(-5/18)+1=-20/18+1= -10/9+9/9= -1/9
结果 x=0 y= -1/9 z= -5/18
4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1
x+y+z=2 4x+2y+z=4 2x+3y+z=1
x-y-z=1 2x+y-3z=4 3x-2y-z=-1
x+y-z=6 x-3y+2z=1 3x+2y-z=4 阿
x+y-z=6,x-3y+2z=1,3x+2y-z=4
x+y+z=-5,3x+y+z=1,4x+3y+2z=-2快
3x+2y+z=4 x+y+z=10 2x+3y-z=1
x+y-z=6 x-3y+2z=1 3x+2y-z=4
3X+Y+Z=0,2X-Y+3Z=1,X+2Y-Z=4
3x-y+2z=-1 4x+y+z=5 x-2y-z=-2
{3X+2Y+Z=4X+Y+Z=102X+3Y-Z=1
x+y-z=6 x-3y+2z=1 3x+y-z=4
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
x+y+z=-1 4x-2y+3z=5 y-z=8-2x
2x+3y+z=8 4x-y-z=10 x+2y-z=1
x+y+z=1 4x+5y-z=6 x+2y-z=3
{x+y+z=1 {x+3y+7z=2 {x+5y+19z=4
1.{x:y:z=3:4:5 2x+3y-5z=-142.{x-y-z=-1 3x+5y+7z=11 4x-y+2z=-13.{x+y=1 x+z=0 2x+y+2z=44.{x-y+z=-3 2x-y-z=-2 -3x+y+z=-15.{x-y+z=-3 3x+y-4z=6 2x+y-z=36.{x-2y+5z=16 2x+y-5z=7 2x-y+z=38