Предмет:
МатематикаАвтор:
аноним1) Найдем сумму членов 11х и 6х и упростим левую часть уравнения:
17х = 408.
2) В полученном выражении 17 и х — множители, 408 — произведение.
Чтобы найти неизвестный множитель, необходимо произведение разделить на известный множитель:
х = 408 : 17,
х = 24.
3) Выполним проверку правильности решения уравнения:
11 * 24 + 6 * 24 = 408,
264 + 144 = 408,
408 = 408.
Равенство верно, значит, уравнение решено правильно.
Ответ: х = 24 — корень заданного уравнения.
Автор:
chandlerosborneДобавить свой ответ
1. Выберите правильный вариант ответа
1. While the workers were repairing the roof, they ... the bathroom window.
a) break b) have broken c) broke d) was broken
2. What did you do while ... for the others to come?
a) you were waiting b) have you been waiting c) were you waiting d) you waited
3. Don’t you think Ian ... just like his father?
a) is looking b) has been looking c) has looked d) looks
4. I... the whole of War and Peace by the time I was seven years old
a) was reading b) had read c) had been reading d) had been read
5. ‘Why were you so tired yesterday?’ ‘Because I... all morning.’
a) jog b) had been jogging c) was jogged d) had been jogged
6. It was … mistake I have ever made.
a) the worst b) good c) bad d) worse
7. What is … month of the year?
a) short b) shorter c) the shortest d) longer
8. It was … film I have ever seen.
a) the best b) better c) good d) bad
9. Your house is not so… as mine.
a) older b) the newest c) newer d) new
10. The Chinese grammar is… than the English one.
a) more difficult b) easy c) difficult d) the easiest
11. My brother (to spend) last summer in the country.
a) spends b) spent c) will spend d) is spending
12. What … your sister (to do) yesterday?
a) did … do b) do … do c) will … do d) is … doing
13. I (not to eat) ice-cream tomorrow.
a) do not eat b) didn’t eat c) won’t eat d) am not eating
14. Your grandfather (to spend) last summer in the country?
а) did … spend b) does … spend c) will … spend d) is … spending
15. I (not to eat) ice-cream every day.
a) am not eating b) didn’t eat c) won’t eat d) do not eat
II. Составьте предложения из данных слов.
16. an island, The Statue of Liberty, is, located, New York, on, in.
17. The, administrative , centre ,Westminster, historical, and, of, London, is.
18. the Thames , London, on, River, stands .
III. Ответьте на вопросы.
19. What parts does London consist of?
20. When did Christopher Columbus discover America?
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