25 человек писали олимпиаду “Выходи решать” по математике. Оказалось, что суммарно было

25 человек писали олимпиаду “Выходи решать” по математике. Оказалось, что суммарно было решено 106 задач, причем каждый из школьников решил 3, 4 или 5 задач. На сколько больше учащихся решило 5 задач, по сравнению с учащимися, которые решили 3 задачи? Полученное значение впишите в поле для ответа.
- Предмет:
  Математика
- Автор:
  jaxonromero
- 5 лет назад

Ответы 1

Можно системой
5x+4y+3z=106
x+y+z=25
Второе уравнение умножаем на 4 и вычитаем (1)-(2)
x-z=6
Ответ:6
- Автор:
  autumn4tmo
- 5 лет назад
- 0
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