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数学
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解方程 8+5/7X=23.X-0.5X=15
解方程
8+5/7X=23.X-0.5X=15
人气:427 ℃ 时间:2020-05-11 23:43:54
解答
8+5/7X=23.X-0.5X=15
5x/7=15 0.5x=15
x=21 x=30
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