z=2x+3y-11然后代入式得到5x+5y=20可得到x+y=4得到z=-2,然后 代入1和3式然后1式乘以2,3式乘以2,可得到y=1,然后代入任意一式得到x值.
3x+2y+z=9,x+y+2z=0,2x+3y-z=11
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相关问题
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2x+3y+z=0 3x+y-4z=11 x+y+z=-3
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x+2y+3z=14 2x+y+z=7 3x+y+2z=11 求x y z
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x+2z=3 x+y+z=2 2x+y=2 3x-y-4z=5 2y+z=7 2x+3y-2z=0
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2x+y+2z=4 3x-2y+z=11 x+y+2z=-2
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{2x-y+3z=21 x+2y-z=3 3x+2y-2z=9}
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(1){x+2y+3z=14① {2x+y+z=7②{3x+y+2z=11③