which are 7 times as much as the sum of its two didits.是神马意思

鑫未甘_情非愿2022-10-04 11:39:542条回答

which are 7 times as much as the sum of its two didits.是神马意思啊?

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lovexiaophai 共回答了19个问题 | 采纳率89.5%: 是不是这个意思：
一个两位数,它的值等于自身两位数字之和的7倍.这是什么数?
设十位数为x,个位数为y.
(x + y)*7 = x*10 + y => x = 2y
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nicer
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D

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可以
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5.C （from ,to）

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