ДАНО Кос = 30 шт Фед = Кос + 20%*Кос - Федя на 20% больше Кости Фед =Фокс -20%*Фокс РЕШЕНИЕ Часть от целого находим умножением на долю (даже, если она больше целого) 1) Фед = Кос*(100+20)% = 30 * 1,2 = 36 шт- слепил Федя (и это 80% от Фокса) Целое по его части находим делением на её долю. 2) Фокс = Фед : 80% = 36 : 0,8 = 45 шт - ФОКС - ОТВЕТ Дополнительно. Специально не применял специальные обозначения для неизвестных - для лучшего прочтения задачи. При записи, конечно, надо ввести неизвестные, например, X,Y,Z. Но ведь тогда читать будет не интересно.
299...3 -> 119...3 -> 29...3 ->...->23->5 Посредством четырех тысяч тридцати пяти операций мистер Фокс получил из числа 299999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999993 цифру 5.
