Предмет: Математика, автор: pomogiteplz71

Помогите пожалуйста!!

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Автор ответа: FriendlyCat

0

$-\frac{1}{6} +(-\frac{2}{7})=-\frac{1}{6} -\frac{2}{7} =-\frac{1*7-2*6}{42} =-\frac{-5}{42}= +\frac{5}{42}$

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