Question

методом с заменой переменных

Answer 1

Ответ:

$\frac{3x - 1}{x + 1} = y$

${y}^{2} - 9y + 14 = 0$

$y1 = 2 \\ y2 = 7$

$\frac{3x - 1}{x + 1} = 2 \\ 3x - 1 = 2x + 2 \\ x = 3$

$\frac{3x - 1}{x + 1} = 7 \\ 3x - 1 = 7x + 7 \\ x = - 2$