Question

Помогите с заданием

Answer 1

$4(4x - y - 5) - 3(5x - y - 8) = 16x - 4y - 20 - 15x + 3y + 24 = x - y + 4$
$\frac{y - x}{3} = \frac{x - y}{2} \\ 2(y - x) = 3(x - y) \\ 2y - 2x = 3x - 3y \\ 2y + 3y = 3x + 2x \\ 5y = 5x \\ y = x$
$x - y + 4 = x - x + 4 = 4$
Ответ: 4.