Предмет: Алгебра, автор: Ridol123

Таня в школу сначала едет на автобусе, а потом идёт пешком. Вся дорога у неё занимает 30 минут. Идёт она на 10 минут дольше, чем едет на автобусе. Сколько минут она едет на автобусе?

Ответы

Автор ответа: andekeve

a + b = 30
a+10 = b
a = ?
30-10 = 20 (минут) - и едет, и идёт. Только идёт на 10 мин меньше
20 : 2 = 10 (минут) - или едет, или идёт меньше на 10 мин
10+10 = 20 (мин) - идёт
Ответ: она едет на автобусе 10 минут.

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