\[\frac{5x + 4}{7x - 2} + \frac{x - 3}{2 - 7x} = \frac{A}{7x - 2}\]
\[\frac{5x + 4 - x + 3}{7x - 2} = \frac{A}{7x - 2}\]
\[A = 4x + 7\]
\[Ответ:A = 4x + 7.\]