Question

{2x+5y=10 {x-2y=3
памогите

Answer 1

Ответ:

$2x + 5y = 10 \\ x - 2y = 3 \\ \\ 5y = 10 - 6 - 4y\\ x = 3 + 2y \\ \\ 9y = 4 \\ x = 3 + 2y \\ \\ y = \frac{4}{9} \\ x = 3 + 2 \times \frac{4}{9} \\ \\ y = \frac{4}{9} \\ x = \frac{27 + 8}{9} \\ \\ y = \frac{4}{9} \\ x = 3 \frac{8}{9}$