Question

Помогите пожалуйста !!

Answer 1

1.
$5x = 35 \ y = 2x + 3 \ \ x = 7 \ y = 2x + 3 \ \ x = 7 \ y = 2 times 7 + 3 = 17$
Ответ: (7; 17)

2.
$5x + 3y = 9 \ y = - 2 \ \ y = - 2 \ 5x = 9 - 3y \ \ y = - 2 \ 5x = 9 - 3 times ( - 2) = 15 \ \ y = - 2 \ x = 3$
Ответ: (3; -2).

3.
$y = 3x \ x - 2y = - 10 \ \ y = 3x \ x - 2 times 3x = - 10 \ \ y = 3x \ - 5x = - 10 \ \ y = 3x \ x = 2 \ \ x = 2 \ y = 6$
Ответ: (2; 6)