4. Решите уравнения: a) 7 5/13 - x = 2 2/13 б) x + 4 3/11 = 6 8/11

а) \(7 \frac{5}{13} - x = 2 \frac{2}{13}\) \(x = 7 \frac{5}{13} - 2 \frac{2}{13}\) \(x = (7 - 2) + (\frac{5}{13} - \frac{2}{13})\) \(x = 5 + \frac{3}{13}\) \(x = 5 \frac{3}{13}\) б) \(x + 4 \frac{3}{11} = 6 \frac{8}{11}\) \(x = 6 \frac{8}{11} - 4 \frac{3}{11}\) \(x = (6 - 4) + (\frac{8}{11} - \frac{3}{11})\) \(x = 2 + \frac{5}{11}\) \(x = 2 \frac{5}{11}\)