Пожалуйста помогите 1)4y-8=20 2)Y+3в=-14 Ответ 1 уравнения используется в 2 уравнении

Пожалуйста помогите
1)4y-8=20 2)Y+3в=-14
Ответ 1 уравнения используется в 2 уравнении место Y надо под ставить ответ от 1 уравнения
- Предмет:
  Математика
- Автор:
  jeremy
- 5 лет назад

Ответы 3

в ответе забыла минус* (в=-7)
- Автор:
  yair
- 5 лет назад
- 0
Ответ:
1. 4у=20+8
у=28/4
у=7
2. подставляем значение у от первого уравнения во второе:
7+3в=-14
3в=-14-7
3в=-21
в=-21/3
в=7
- Автор:
  donutsy1kv
- 5 лет назад
- 0
1)Y=7; 4*7-8=20. 4*7=282)в=-7; 7+3*(-7)=-14. 3*(-7)=-21
- Автор:
  serenity
- 5 лет назад
- 0
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Пожалуйста помогите 1)4y-8=20 2)Y+3в=-14 Ответ 1 уравнения используется в 2 уравнении место Y надо под ставить ответ от 1 уравнения

Ответы 3

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Пожалуйста помогите
1)4y-8=20 2)Y+3в=-14
Ответ 1 уравнения используется в 2 уравнении место Y надо под ставить ответ от 1 уравнения