чему равно значение выражения: 1)-0,9х-(0,6+0,5у) если 3х+у=-0,2

чему равно значение выражения:
1)-0,9х-(0,6+0,5у) если 3х+у=-0,2
- Предмет:
  Математика
- Автор:
  jaxlbtq
- 6 лет назад

Ответы 5

Спасибо)
- Автор:
  lola53
- 6 лет назад
- 0
такое же задание как у тебя,только там 0,6х,ты верно дала условие?
- Автор:
  kadincohh
- 6 лет назад
- 0
Да,там 6х,не верно условие дала:(
- Автор:
  shannon8dyj
- 6 лет назад
- 0
-0,9х-(0,6х+0,5у)=-0,9х-0,6х-0,5у=-1,5х-0,5у=-1,5х-0,5*(-0,2-3х)=-1,5х+0,1+1,5х=0,1
- Автор:
  madonna
- 6 лет назад
- 0
1) -0,9х-(0,6+0,5у)=-0,9х-0,6-0,5у; 3х+у=-0,2,отсюда у=-0,2-3х,тогда -0,9х-0,6-0,5(-0,2-3х)=-0,9х-0,6+0,1+1,5х=0,6х-0,5
- Автор:
  brookeromero
- 6 лет назад
- 0
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чему равно значение выражения: 1)-0,9х-(0,6+0,5у) если 3х+у=-0,2

Ответы 5

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чему равно значение выражения:
1)-0,9х-(0,6+0,5у) если 3х+у=-0,2