Предмет: Математика, автор: asiacinabekoa

найдите решение систем уравнений
1)х=-7+у   |2)у=х-5    |3)-х=3-2у
2х-3у=-16 | 4х+у=10 |х-5у=-6​

Приложения:

Ответы

Автор ответа: AlexandraF11
6

Ответ:

1) 2(y - 7) - 3y = 16

2y - 14 - 3y - 16 = 0

-y = 30

y = - 30

x = -37

2) 4x +x - 5 = 10

5x = 5

x = 1

y = -4

3) x = 2y - 3

2y - 3 - 5y + 6 = 0

-3y = -3

y = 1

x = -1

Пошаговое объяснение:

складываем первое и второе уравнение, при этом одна переменная сокращается.

1)x+y=14,

х-у=8

2x = 22

x = 11

y = 3

2)х- у = 7

х+у= 23;

2x = 40

x = 20

y = 3

3)х+у= 32,

х – у = 14

4)х-у=9

х+у= -29

2x = -20

x = -10

y = -19

5)2х+у=11

3х – у = 4;

5x = 15

x = 3

y = 5

6)3х – у = 5,

4х+у=9

7x = 14

x = 2

y = 1


asiacinabekoa: давай 16
asiacinabekoa: ок?
AlexandraF11: ок
asiacinabekoa: только успей первым взять я зада вопрос очень легкий
asiacinabekoa: ок неу
asiacinabekoa: оу*
asiacinabekoa: у меня осталось 4
asiacinabekoa: не успела
asiacinabekoa: оооооо
asiacinabekoa: 9 осталось
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