Света купила 5 карандашей по цене х р. за карандаш,а Таня-7 ручек по цене в 1,8 раза выше,чем

Света купила 5 карандашей по цене х р. за карандаш,а Таня-7 ручек по цене в 1,8 раза выше,чем цена за карандаш.После этого у Светы осталось 49,2р.,а у Тани-15 р.
Составьте уравнение, зная, что у Светы и Тани первоначально денег было поровну.
- Предмет:
  Математика
- Автор:
  warrenugsv
- 6 лет назад

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