Предмет: Алгебра, автор: pobidash2210

33*. У першій книжці а сторінок, у другій — на b сторінок менше, ніж у першій, а у третій - удвічі більше сторінок, ніж у другій. Запишіть у вигляді виразу кількість сторінок у трьох книжках разом.
Пожалуйста очень срочно прошу

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Автор ответа: cutefoxkelvin

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ответ и решение на фотографии

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