a) \(\frac{4}{18} + n = \frac{4}{18} + 1 \frac{3}{18} = \frac{4}{18} + \frac{21}{18} = \frac{25}{18} = 1 \frac{7}{18}\)
б) \(m - \frac{1}{9} = 6 \frac{5}{9} - \frac{1}{9} = \frac{59}{9} - \frac{1}{9} = \frac{58}{9} = 6 \frac{4}{9}\)
в) \(\frac{4}{15} + \frac{3}{15} + x = \frac{4}{15} + \frac{3}{15} + 1 \frac{3}{15} = \frac{4}{15} + \frac{3}{15} + \frac{18}{15} = \frac{25}{15} = \frac{5}{3} = 1 \frac{2}{3}\)
г) \(\frac{13}{19} - \frac{3}{19} - z = \frac{13}{19} - \frac{3}{19} - \frac{5}{19} = \frac{13-3-5}{19} = \frac{5}{19}\)