Предмет: Алгебра, автор: jdhvciudfh

на трех полках стоят книги. на первой полке стоит a книг, на второй-на 3 книги больше, чем на первой, а на третьей- на 5 книг меньше, чем на второй. Сколько книг стоит на трех полках?

Ответы

Автор ответа: tanya2512

а+(а+3)+(а+3-5)=3а+1

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