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Автор - khabibullinakv

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Ответ

Автор - ShmigYouTuber

Вместо х подставляем 1/4

Решаем линейное уравнение:

16*1/4+1/4b-15=0

1+1/4b-15=0

1/4b=14

b=14:0,25(1/4=0,25)

b=56

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