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用加减消元法解下列方程组3x+2y=2 x-2y=6
人气:327 ℃ 时间:2019-10-27 17:46:06
解答
3x+2y=2……① x-2y=6……②
①+②得,4x=8,∴x=2
把x=2代入①得,6+2y=2,∴y=-2
∴方程组的解是{x=2 y=-2
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