Предмет: Алгебра, автор: replay231209

Помогите пожалуйста даю 15 балов

Розв'яжіть методом підстановки систему рівнянь

х+4у=-6
3х-у=8

Ответы

Автор ответа: 44pm
1

Ответ:

Объяснение:

x + 4y = -6

4y = -x - 6

y = (-1/4)x - 3/2

Тепер ми можемо підставити цей вираз для y у друге рівняння:

3x - (-1/4)x - 3/2 = 8

Додавання (-1/4)x до 3x дає нам (11/4)x, тому

(11/4)x - 3/2 = 8

(11/4)x = 19/2

x = (19/2) * (4/11) = 38/11

Тепер ми можемо використати це значення, щоб знайти y:

y = (-1/4)(38/11) - 3/2 = -41/22

Таким чином, розв'язком системи рівнянь є:

x = 38/11

y = -41/22

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