解下面三元一次方程组9x-5y+z=5 9x+y+4x=14 -9x+3y-5z=-11 3x-5y+2z=14x+5y-z=5x-5y+3z=-24x+3y-2z=-7 5x-6y+z=-2 2x+z=-2 5x-3y+6z=-3 2x-y+3z=0 y+3z=6 3x+2y 2x+y x-y+1 ----- - ---- = ----- 4 5 6

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解下面三元一次方程组9x-5y+z=5 9x+y+4x=14 -9x+3y-5z=-11 3x-5y+2z=14x+5y-z=5x-5y+3z=-24x+3y-2z=-7 5x-6y+z=-2 2x+z=-2 5x-3y+6z=-3 2x-y+3z=0 y+3z=6 3x+2y 2x+y x-y+1 ----- - ---- = ----- 4 5 6
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解下面三元一次方程组9x-5y+z=5 9x+y+4x=14 -9x+3y-5z=-11 3x-5y+2z=14x+5y-z=5x-5y+3z=-24x+3y-2z=-7 5x-6y+z=-2 2x+z=-2 5x-3y+6z=-3 2x-y+3z=0 y+3z=6 3x+2y 2x+y x-y+1 ----- - ---- = ----- 4 5 6
解下面三元一次方程组
9x-5y+z=5
9x+y+4x=14
-9x+3y-5z=-11
3x-5y+2z=1
4x+5y-z=5
x-5y+3z=-2
4x+3y-2z=-7
5x-6y+z=-2
2x+z=-2
5x-3y+6z=-3
2x-y+3z=0
y+3z=6
3x+2y 2x+y x-y+1
----- - ---- = -----
4 5 6

解下面三元一次方程组9x-5y+z=5 9x+y+4x=14 -9x+3y-5z=-11 3x-5y+2z=14x+5y-z=5x-5y+3z=-24x+3y-2z=-7 5x-6y+z=-2 2x+z=-2 5x-3y+6z=-3 2x-y+3z=0 y+3z=6 3x+2y 2x+y x-y+1 ----- - ---- = ----- 4 5 6
1、
x=y=z=1
2、
x=1
y=0
z=-1
3、
x=-22/19
y=5/57
z=82/19
4、
x=-1.5
y=z=1.5
5、
解二元一次方程必须有两条方程
现只有一条 故不能解
化简得
11x + 28y = 10