Решить систему: 2x-3y=9; 4x+5y=27
Koshachiy1pupochek
3
21.07.2019 00:30
0
Другие вопросы по теме Математика
iraapukhtina7
18.05.2019 15:50
marinamoshonkina
18.05.2019 15:50
Виолакеса
18.05.2019 15:50
FvitalikA
18.05.2019 15:50
барни6
18.05.2019 15:50
saha202000
18.05.2019 15:50
Emil304
18.05.2019 15:50
kostiusikao
18.05.2019 15:50
xxx158
18.05.2019 15:50
Популярные вопросы
- In pairs, answer the questions about yourself. Then interview your partner. — В...
2 - Look at the sentences in Exercise 3 and choose the correct words in these rules....
3 - Love and trust — Любовь и доверие Read, listen and talk about love and relationships....
2 - Match the phrasal verbs in sentences 1-5 with definitions a-e. Use a dictionary...
1 - Put the verbs in capital letters into the correct form in the text. My uncle is...
3 - Read the story and fill in the gaps with the words below. Each word can be used...
3 - In pairs, use the ideas below to interview your partner. — В парах используйте...
3 - In pairs, decide which of the people in the story ‘Sunshine’ said these statements....
1 - Read the sentences and answer the questions. — Прочитайте предложения и ответьте...
2 - Do you know whom this story is about? — Вы знаете о ком эта история? 1. Alexander...
1
4х+5у=27
6х-9у=27
4х+5у=27
6х-9у=4х+5у; 2х=14 у; х=7у.
Подставим значение х в любое уравнение:
2*7у-3у=9; 14у-3у=9; 11у=9; у=9\11
х=7*9\11; х=63\11; х=5 8\11
ответ: (5 8\11; 9\11)
4х+5у=27
6х-9у=27
4х+5у=27
6х-9у=4х+5у; 2х=14 у; х=7у.
2*7у-3у=9; 14у-3у=9; 11у=9; у=9\11
х=7*9\11; х=63\11; х=5 8\11
ответ: (5 8\11; 9\11)