[Toán 7] Toán chia hết

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huyenthanh2003

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phamhuy20011801

$2n+1 \vdots 16-3n$
$3(2n+1) \vdots 16-3n$
$2(3n-16)+35 \vdots 16-3n$
$\longrightarrow 16-3n \in Ư(35)$
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