Решите уравнение: 5/7х+11/21х+2/3х=5 5/7 - №18862573

Решите уравнение:
5/7х+11/21х+2/3х=5 5/7
- Предмет:
  Математика
- Автор:
  luzymom
- 6 лет назад

Ответы 1

$\frac{5}{7}x+\frac{11}{21}x+\frac{2}{3}x=5\frac{5}{7}\\\frac{15}{21}x+\frac{11}{21}x+\frac{14}{21}x=\frac{40}{7}\\\frac{40}{21}x=\frac{40}{7}\\x=\frac{40}{7}:\frac{40}{21}=\frac{40}{7}*\frac{21}{40}=3$
- Автор:
  mandin5ui
- 6 лет назад
- 0
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№1
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