Ответ учителя по предмету Алгебра
S-290км
Vл-20км/ч
Vт-Х
tпо теч- 8ч
tпр теч- 6ч
8(20+х)+6(20-х)=290
160+8х+120-6х=290
2х=10
Х=5
5км/ч- Vтеч
S-290км
Vл-20км/ч
Vт-Х
tпо теч- 8ч
tпр теч- 6ч
8(20+х)+6(20-х)=290
160+8х+120-6х=290
2х=10
Х=5
5км/ч- Vтеч
Похожие вопросы от пользователей
What will life be like in the 21st century? Look at the prompts and make sentences usingwillorwon’t, as in the example.
Пример: 1. People / live longer People will live longer.
2. Robots / do most of the work 3. People / use electric cars 4. Pollution / disappear 5. People / die of serious diseases 6. Children / stop going to school 7. People / go on holiday to the moon