Question

помогите решить второй пример.

Answer 1

$6 - 5(x - y) = 7x + 4y \ 3(x + 1) - (6x + 8y) = 69 + 3y \ \ 6 - 5x + 5y = 7x + 4y \ 3x + 3 - 6x - 8y = 69 + 3y \ \ - 5x - 7x + 5y - 4y = - 6 \ 3x - 6x - 8y - 3y = 69 - 3 \ \ - 12x + y = - 6 \ - 3x - 11y = 66 \ \ - 132x + 11y = - 66 \ - 3x - 11y = 66 \ \ - 135x = 0 \ y = 12x - 6 \ \ x = 0 \ y = - 6$
Ответ: (0; -6)