Предмет: Математика, автор: ал12

сумма цифр двузначного числа равна наименьшему двузначному числу ,а цифра десятков в четыре раза меньше цифры единицы, найти это число

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Автор ответа: love67

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наименьшее двузначное число 10 сумма цифр со числа, составляющие в сумме 10==это 1 и9, 2и8, 3и7, 4и6, 5и 5

нам надо выбрать,чтоб цифра десятков в четыре раза меньше цифры единицы

это очевидно что числа 2 и8

искомое число 28

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