Question

3(x - 2) - 2(y + 1) = -1,
5(x + 3) - 8(y - 2) = 45;
пожалуйста помогите​

Answer 1

Ответ:

2; -0.5

$3x - 6 - 2y - 2 = - 1 \\ 5x + 15 - 8y + 16 = 45 \\ 3x - 2y = 7 \\ 5x - 4 \times 2y = 14 \\ 2y = 3x - 7 \\ 5x - 4(3x - 7) = 14 \\ 5x - 12x = - 14 \\ x = 2 \\ y = - \frac{1}{2}$