Предмет: Математика, автор: милиса3

за две книги заплатили 272 руб. цена одной книги составляет третью часть цены другой книги Сколько стоит каждая книга

Ответы

Автор ответа: Kalica228

X - цена книги.

x+3x=272
4x=272
x=68 р стоимость одной книги.

68*3 = 204 р цена второй книги

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