5. Решите уравнения. a) x-1 5/7=2 1/7; б) (12 5/13+y)-9 9/13=7 7/13

5. Решим уравнения. a) \(x - 1 \frac{5}{7} = 2 \frac{1}{7}\) \(x = 2 \frac{1}{7} + 1 \frac{5}{7}\) \(x = 3 \frac{6}{7}\) б) \((12 \frac{5}{13} + y) - 9 \frac{9}{13} = 7 \frac{7}{13}\) \(12 \frac{5}{13} + y = 7 \frac{7}{13} + 9 \frac{9}{13}\) \(12 \frac{5}{13} + y = 16 \frac{16}{13}\) \(12 \frac{5}{13} + y = 17 \frac{3}{13}\) \(y = 17 \frac{3}{13} - 12 \frac{5}{13}\) \(y = 16 \frac{16}{13} - 12 \frac{5}{13}\) \(y = 4 \frac{11}{13}\) Ответ: а) 3 \(\frac{6}{7}\); б) 4 \(\frac{11}{13}\)