40% от 75 = 75/25*10 = 30
75 + 30 = 105
3/4 всей книги = 105 страниц
105/3*4 = 140
ответ: 140
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40% от 75 = 75/25*10 = 30
75 + 30 = 105
3/4 всей книги = 105 страниц
105/3*4 = 140
ответ: 140