Предмет: Математика, автор: Neekeeta

Решить задачу через уравнение:
Количество книг на двух полках было одинаковым. Когда с первой полки переложили 18 книг на вторую, то на второй полке книг стало в 3 раза больше, чем на первой. Сколько книг было на каждой полке первоначально?
Даю 15 баллов.

Ответы

Автор ответа: prettypushkova
0
Пусть на каждой полке было по х книг.
(х - 18) * 3 = х + 18
3х - 54 = х + 18
3х - х = 18 + 54
2х = 72
х = 36 (книг) - было на каждой полке первоначально
Проверка: 36 - 18 = 18 книг осталось на первой полке
                36 + 18 = 54 книг стало на второй полке
                54 : 18 = 3 - в три раза больше
Ответ: первоначально на каждой полке было по 36 книг.
Автор ответа: Neekeeta
0
Спасибо огромное.
Автор ответа: prettypushkova
0
Пожалуйста
Автор ответа: aziza0602
0
спасибо большое мне тоже очень было этот задача
Автор ответа: dbezborodova
0
спасибо очень помогли
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