Предмет: Математика, автор: iksdv

Решите уравнения пж 13 баллов

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Автор ответа: lenok3781

1

г) ещё так можно:

5,031+(х+7,869)=13,9
5,031+х+7,869=13,9
х=13,9-5,031-7,869
х=1

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