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Бобры распилили несколько брёвен. Они сделали 11 распилов и получили 15 маленьких брёвнышек. Сколько брёвен они распилили? Помогите пожалуйста решить эту задачу. Заранее огромное спасибо за помощь!!!!!
спросил от в категории Математика

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