3. Решите уравнение: a) 5,23 + x = -7,24; б) \(y - 2\frac{5}{12} = -3\frac{7}{15}\)

Решение: a) \(5,23 + x = -7,24\) \(x = -7,24 - 5,23\) \(x = -12,47\) б) \(y - 2\frac{5}{12} = -3\frac{7}{15}\) \(y = -3\frac{7}{15} + 2\frac{5}{12}\) \(y = -3\frac{28}{60} + 2\frac{25}{60}\) \(y = -1\frac{3}{60}\) \(y = -\frac{3}{60} + 1\) \(y = -\frac{1}{20}\) \(y = -0.05\)