Предмет: Математика, автор: Hell0ween

В Книгу вошли 3 повести.
Первая повесть занимает 44% всей книги
Вторая 9/11 числа страниц первой
Третья оставшиеся 90 страниц
Вопрос: Сколько их всего в книге?
[Ответ желательно с обьяснением ]

Ответы

Автор ответа: Silеncе

х страниц в книге
0,44х страниц в первой повести 44 % это 0,44
0,44х*9/11=0,36х страниц во второй

0,44х+0,36х+90=х
0,8х+90=х
0,8х-х=-90
0,2х=90
х=450 страниц в книге

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