2X+2Y+Z=4 ...①
X+4Y+3Z=6 ...②
X+3Y+2Z=7...③
②-③
得y+z=-1...④
2②-①
得6y+5z=8...⑤
6④-⑤
得z=-14
代入④得y=13
再将z=-14,y=13代入②
得x=-4
综上所述x=-4,y=13,z=-14
2X+2Y+Z=4 X+4Y+3Z=6 X+3Y+2Z=7
2个回答
相关问题
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2x+y+3z=5 3x-2y-z=6 4x-3y+2z=4