5. Решите уравнения. a) \(x - 1\frac{5}{7} = 2\frac{1}{7}\) б) \((12\frac{5}{13} + y) - 9\frac{9}{13} = 7\frac{7}{13}\)

1. a) \(x - 1\frac{5}{7} = 2\frac{1}{7}\) \(x = 2\frac{1}{7} + 1\frac{5}{7}\) \(x = 3\frac{6}{7}\)
2. 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:

<ol>
  <li>a) \(x = 3\frac{6}{7}\)</li>
  <li>б) \(y = 4\frac{11}{13}\)</li>
</ol>