Предмет: Қазақ тiлi, автор: dariaorynbasar

4. Тендеулер жүйесін алмастыру тәсілімен шешіңіз: y + 2x = - 1, 5x - 4y = 10, 5 ​

Kamito003: Ответ дарма?

Ответы

Автор ответа: bekentainurislam
2

Ответ:

{3x-20y=11

x=10-6y

3(10-6y)-20y=11

30-18y-20y=11

 30-38y=11

 38y=30-11

  38y=19

    y=19:38

       y=0,5

    x=10-6*0,5=10-3=7

Объяснение:

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