Предмет: Алгебра, автор: новокутово

на три полки поставили 278 книг.На первую из них поставили на 14 книг больше,чем на вторую.на третью полку-в 2 раза больше,чем на вторую.сколько книг поставили на первую полку?

Ответы

Автор ответа: Provocator

Решение на картинке, удачи.
х-первая полка, у- вторая, z-третья)

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