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w0bneir
w0bneir
23.11.2020 11:26 •  Английский язык

х-у=1
{х+у=7

{3х-8у=18
{-3х+4у=-6

Заранее

👇
Ответ:
dashapendus2003
dashapendus2003
23.11.2020

В первом случаи

X=4

Y=3

Во втором случаи

Если это система уравнений, то действуем методом сложения противоположных чисел (в данном случае это 3х и -3х) Складываем:

-8у+4у=18+(-6)

-4у=12

у=-3

Подставим значение у в любое из уравнений (я во второе)

3х-8*(-3)=18

3х+24=18

3х=18-24

3х=-6

х=-2

4,6(65 оценок)
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Ответ:
Znatok00011
Znatok00011
23.11.2020

My hobby is playing computer games. These can be shooters, RPGs, arcades – anything. I can play computer the whole day when I have free time. My mom says it's bad for my eyes but I just can't stand playing all those awesome games. I often invite my friends to play with me and we have a lot of fun together. I'm looking forward to buying VR-glasses to try my skills in virtual reality. Maybe one day I'll even take part in one of those cyber-sport competitions, who knows. But actually I play for fun, not for fame or money.

4,4(1 оценок)
Ответ:
dima012002
dima012002
23.11.2020

My hobby is reading. It has been a great pleasure for me since my childhood. The world of literature is fascinating and infinite. It certainly doesn’t mean that I love all the books. To tell the truth, finding a good book is not so easy. I prefer historical novels, classical and informative literature and some professional books concerning business and management as I am going to run a business of my own in future. I never choose a book only by its colourful cover. As a rule, I look through its pages, read about the writer and his awards. My favourite writers are Victor Hugo, Alexandre Dumas and Dan Brown.

It goes without saying that some of the books have become my favourites. When I open one of them I immerse in the world of my favourite heroes at once. A book is able to make me laugh or cry because I start feeling exactly what the characters feel

4,4(28 оценок)
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