Предмет: Математика, автор: ninalev4enco

За два дні магазин продав 15 смартфонів, причому за другий День було продано вдвічі більше, ніж за перший. Скільки смартфонів продали за перший день? ПОМОГИТЕ РЕШИТЬ АРИФМЕТИЧНЫМ СПОСОБОМ ПОЖАЛУЙСТА

Ответы

Автор ответа: micentik
1

Ответ:

5

-------------------

1 + ( 1 • 2 ) = 3

2 + ( 2 • 2 ) = 6

3 + ( 3 • 2 ) = 9

4 + ( 4 • 2 ) = 12

5 + ( 5 • 2 ) = 15

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