Предмет: Математика, автор: Аноним

На двух полках 72 книги,причем на первой полке в 3 раза больше,чем на второй.Сколько книг на первой полке

Ответы

Автор ответа: Nastya14210311
0
3х+х=72
4х=72
х=72:4
х=18 книг на 2 полке
18*3=54 книг на 1 полке
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