Смотрите.
1) Обозначаем t — сколько времени они шли в первый день, тогда (t-1) — сколько во второй.
2) Теперь следующее соотношение — про 6 километров. Пускай в первый день они км, а во второй день — s2, тогда нам дано:
s1-s2=6.
3) Вспоминая, что расстояние=время*скорость (s=v*t), подставляем в эту формулу вместо s1 и s2:
(3,5*t)-(3*(t-1))=6.
Упрощаем:
3,5t-3t+3=6;
0,5t=3;
t=6.
ответ: Таким образом, в первый день они шли 6 часов. Во второй день — 6-1=5 (часов во второй день — 3*5 = 15 (км)
Пошаговое объяснение:
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567:6=94 (ост.3)
982:26=37 (ост.20)
312:19=16 (ост.8)
1733:4=433 (ост.1)
4183:53=78 (ост.49)