Предмет: Математика, автор: Аноним

Реши систему уравнений: { y+x=6
{x−y=13

( ; ) .

Ответы

Автор ответа: Аноним
1
Ответ на картинке.........
Приложения:
Автор ответа: valeria02092002
2

Ответ:

Пошаговое объяснение:

1  {x+y=6

  {x-y=13

2  {x+y=6

   {2x=19

3    {x+y=6

    {x=9,5

4    {9,5+y=6

    y=-3,5

х= 9,5

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