цена билетов на концерт эстрадного певца 3000 руб и 4000 рублей.в концертном зале оказалось

цена билетов на концерт эстрадного певца 3000 руб и 4000 рублей.в концертном зале оказалось 12 ряДОВ ПО 25 МЕСТ В КАЖДОМ РЯДУ.НА ВЫСТУПЛЕНИЕ БВЛИ ПРОДАНЫ ВСЕ БИЛЕТЫ ОБЩЕЙ СТОИМОСТЬЮ 100000 РУБЛЕЙ.СКОЛЬКО БИЛЕТОВ ПО ЦЕНЕ 4000 РУБ ПРОДАЛИ
- Предмет:
  Математика
- Автор:
  shiner0mms
- 5 лет назад

Ответы 1

если на 1 000 000пусть мест по 3000 =ха мест по 4000=ух+у=300у=300-х3000*х+4000*у=1000000но у=300-х значит3000х+4000(300-х)=10000003000х+1200000-4000х=1000000-1000х=1000000-1200000х=200000/1000х=200 мест по 3000 руб300-200=100 мест по 4000 рубпроверка200*3000+100*4000=600000+400000=1000000
- Автор:
  blankenship
- 5 лет назад
- 0
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