Предмет: Математика, автор: Marlah

Альбом стоит a р., а тетрадь на 8 р. дешевле альбома. Сколько всего рублей надо заплатить за 5 альбомов и одну тетрадь?
Реши задачу, составляя выражение, и вычисли его значение при a=20.

Ответы

Автор ответа: tanyasilver

2

а р.-цена альбома, тогда (а-8) р.-цена тетради.
5а+(а-8)=5а+а-8=6а-8
Если а=20, то 6*20-8=112 р.
Ответ: 112 р.

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