3. Решите уравнения: a) 5,23 + x = - 7,26; б) x - 2\frac{5}{12} = -3\frac{7}{15}

a) 5,23 + x = - 7,26 x = -7,26 - 5,23 x = -12,49 б) x - 2\frac{5}{12} = -3\frac{7}{15} x = -3\frac{7}{15} + 2\frac{5}{12} x = -3\frac{28}{60} + 2\frac{25}{60} x = -1\frac{3}{60} x = -1\frac{1}{20} x = -1,05