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)