Предмет: Математика, автор: rita64899

помогите пожалуйста решить способом алгебраического сложения

Приложения:

Ответы

Автор ответа: iramazurk

0

Пошаговое объяснение:

17а - 2в = 47 | * -1,5

5а - 3в = 9

-25,5а + 3в = -70,5

5а - 3в = 9

-20,5а = -61,5

5а - 3в = 9

1)

-20,5а = -61,5

а = -61,5 : (-20,5)

а = 3

2)

5а - 3в = 9

5*3 - 3в = 9

15 - 3в = 9

3в = 15 - 9

3в = 6

в = 6 : 3

в = 2

Ответ: (3; 2)

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