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数学
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已知|2m-6|+(3m-n-5)²=0,且(3n-2m)x
人气:355 ℃ 时间:2019-08-26 07:49:13
解答
2m-6=0,m=3
把m=3代入
9-n-5=0,n=4
把m=3和n=4代入
6x
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