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数学
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7+4x=5x-2 解方程
人气:263 ℃ 时间:2020-03-26 21:37:53
解答
移项
5x-4x=7+2
x=9x/3+6=4x-1 怎么解?13x/3=7x=21/13x/3+6=4x/3-1先采纳吧
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