Ответ учителя по предмету Математика
Пусть х — скорость лодки, а у — скорость течения реки, тогда:
x+y=17, x-y=11
x=17-y
17-y-y=11
17-2y=11
2y=17-11
2y=6/:2
y=3
x=17-3=14
Значит, скорость лодки 14 км/ч, а скорость течения 3 км/ч.
Похожие вопросы от пользователей
There (to be) 22 million homes in Britain — big homes and small homes, old cottages and new bulidings, houses and flats. Many British people (to love) old houses. They also (to love) gardening, and there (to be) gardens everywhere you go: in towns, villages and out in the country. Two thirds of families in Britai (to own) their houses. Millions of these houses (to be) the same with two or three bedrooms amd bathroom upstairs, dining room and kitchen downstairs. There (to be) a great many different kinds of homes in Britain, but there (to be) not enough! It (to be) often very diffcult for young people to find a home when they (to want) to start a family. British homes (to be) usually smaller than American homes. But like Americans, different generations usually (not to live) in the same house.