3x-2y+z=3x05x05x05①
2x+y-z=3x05x05x05②
4x+3y+z=-3x05x05③
①+②
5x-2y=6x05x05x05④
②+③
6x+4y=0
y=3x/2x05x05x05x05⑤
⑤代入④
5x-2*3x/2=6
x=3 代入⑤
y=3*3/2=9/2
x=3 y=9/2代入①
3*3-2*9/2+z=3
z=-3
3x-2y+z=3,2x+y-z=3,4x+3y+2=-3
2个回答
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