Два брата идут рядом.Длина шага младшего брата 45 см.Длина шага старшего брата 55 см. Через какое наименьшее расстояние их шаги будут совпадать

They (not to study) Maths now, they (to study) Science Where (to be) you? I (to be) in the gym at the moment He (to like) P.E.? Yes, he (to do). He (to play) volleyball realy well What language Tom and Jack (to speak)? The (to speak) English. They (to be) from Manchester Come and help me! I (to try) to do my History test What your mum (to do)? She (to be) a teacher What your dad (to do)? He is fixing the fridge Where (you (to be) yesterday? I (to be) in the park"

Миша читает книгу в которой 140 страниц всего он прочитал [tex]\frac{5}{7}[/tex] . Сколько страниц осталось прочитать Мише?