(5/7-2/3у)*21=1 уравнение)) помогите

(5/7-2/3у)*21=1
уравнение))
помогите
- Предмет:
  Математика
- Автор:
  fawnjtwb
- 6 лет назад

Ответы 2

$( \frac{5}{7}- \frac{2}{3}y) *21=1 \\ \\ \frac{5}{7}- \frac{2}{3}y= \frac{1}{21} \\ \\ \frac{2}{3}y= \frac{5}{7}- \frac{1}{21} \\ \\ \frac{2}{3}y= \frac{15-1}{21} = \frac{14}{21} \\ \\ y= \frac{14}{21}* \frac{3}{2} \\ \\ y= \frac{7}{7}=1$
- Автор:
  romeooconnell
- 6 лет назад
- 0
(5/7-2у/3)*21=15/7-2у/3=1/212у/3=5/7-1/21=15/21-1/21=14/21=2/3у=2/3:2/3=1
- Автор:
  boomhauerrntb
- 6 лет назад
- 0
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(5/7-2/3у)*21=1 уравнение)) помогите

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(5/7-2/3у)*21=1
уравнение))
помогите