Предмет: Математика, автор: amay27390

решите уравнение 20-2х=х+15

Ответы

Автор ответа: ovosh1otborny

20-2х=х+15

-2х-х=15-20

-3х=-5

х=-5:(-3)

х=1 $\frac{2}{3}$

Если не проходили отрицательные числа:

20-2х=х+15

20-15=х+2х

5=3х

3х=5

х=5:3

х=1 $\frac{2}{3}$

amay27390: спасибоо

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: Регина131

Answer the following questions.

1. Why 2012
was a special year for London?

2. Name the
national musical instrument in Scotland.

3. Which is
the most famous shopping street in London?

4. How much
will it cost you to visit the British Museum, the National Gallery, the Tate
Modern Gallery, the Science Museum and the Imperial War Museum?

5. Who
founded the Tower of London?

6. Which
University did Bill Gates go to?

7. Who was
the King of rock-n-roll?

8. What the
official residence of the Queen in London?

9. Who said
‘When a man is tired of London, he is tired of life’?

10. In what
American state is Hollywood situated?

11. What is
the London eye?

12. How is the British flag often called?

13. The
average American girl has ten Barbie dolls. But when was Barbie created?

14. Who is
the Head of State in the UK?

15. How
often do American people choose a new president?

2 года назад

Предмет: Английский язык, автор: Аноним

Put the verbs in brackets into the Future Simple Tense or the Future Continuous Tense.
1. A: ___________( you / go ) to the post office later?
   B: Yes, would you like me to get anything for you ?
2. A: Did you tell Fred about the party?
   B: Not yet. I ________( see ) him at basketball practice later on, so I _______ ( tell )him then.
3. A: It's so hot !
    B: I________ ( turn on ) the air - conditioning.
4. A: Isn't Carol lucky? In a few weeks she ___________ ( sail ) in the Caribbean.
   B: I know ! She must be excited!
5. A: Are you looking for ward to your to your wedding?
  B: I can't wait ! This time next week I ______________ ( walk ) down the aisle.
6. A: Here's the coat you wanted to borrow.
   B: Oh, thanks very much. I _______________( give ) it back to you on Saturday.
_____________________________________________________________________
Choose the correct item.
1. Don't post Ann's invitation . I______her at work tomorrow, so I'll give it to her.
A) will be seeing B) will see
2.  Behave youtself or else I ______ you to the circus tomorrow.
A) won't be taking B) won't take
3. Our cherry trees_____ in the spring.
A) will bloom         B) will have bloomed
4. " Oh, Jenny. I____ lunch with Sally this afternoon. Do you wsnt to join us?
A) will be having          B) will have
5. A: I'm  going to invite the Johnsons over for a barbecue next Saturday.
  B: Don't bother, they ______ to Paris next.
A) will go         B) are going
6. She hopes she_____a letter from Cindy soon.
A) will receive        B) will be receiving
7. A:______ John today?
   B: Yes, why?
   A: Can you ask him if he can fix the fridge?
A) Will you be seeing        B) Will you have seen

2 года назад

Предмет: Английский язык, автор: Аноним

Put the verbs in brackets into the Future Simple Tense or the Present Con tinuous Tense.
Mary: Where (1)________( you / go ) for your holidays. now that summer is here?
Liz: Now here. I ( 2 )_________( study ) for my exams in September.
Mary: You ( 3 )________( not / take ) a holiday at all this year then?
Liz: No. I must study, or I ( 4 )________ ( not / pass ) the exams. What( 5 )_________ ( you / do ) for the summer ?
Mary: Well, first I (6 )___________ ( visit ) my aunt in Paris and then I ( 7 )____________ ( spend ) a month in Antibes.
Liz: I don't really think I ( 8 )__________ ( have ) the chance to go any where this summer. Anyway , there's always next year , isn't there?
________________________________________________________
Put the verbs in brackets into the Future Simple tense or thr future Continuous Tense.
Sophie: Do you want to go camping this weekend?
Tim: I'd love to. I (1 )______________( call ) you tonight and we can arrange everything.
Sophie: Alright. Do you mind if Ellen comes wih us?
Tim: Of course not. as a matter of fact,( 2 )__________ ( see ) her for lunch so I ( 3 )_____________( ask ) her then.
Sophie: OK. I ( 4 )___________( probably / be ) home at around 8 o'clock so call me then.
Tim: Great ! Just think , in three days time, we ( 5 )______________( put up ) our tents!
Sophie: Oh yes! And we ( 6 )_________( sit ) around a camp fire, grilling delicious fresh fish.
Tim: I can't wait!

2 года назад

Предмет: Математика, автор: ЭнмаАй

|2x+3|≤4 решите неравенство и запишите множество его целых решений
вот знаки-≤ ≥

9 лет назад

Предмет: Математика, автор: милана294

у кати было 47 открыток.она подарила 9 открыток маше и 14 открыток диме.сколько открыток осталось?

9 лет назад