Решите уравнение: a) 1,7y = -14,11; б) (17/21)y + (9/14) = (5/21).

a) \(1.7y = -14.11\) \(y = -14.11 : 1.7\) \(y = -8.3\) б) \(\frac{17}{21}y + \frac{9}{14} = \frac{5}{21}\) \(\frac{17}{21}y = \frac{5}{21} - \frac{9}{14}\) \(\frac{17}{21}y = \frac{10}{42} - \frac{27}{42}\) \(\frac{17}{21}y = -\frac{17}{42}\) \(y = -\frac{17}{42} : \frac{17}{21}\) \(y = -\frac{17}{42} \cdot \frac{21}{17}\) \(y = -\frac{1}{2}\) Ответ: a) y = -8.3; б) y = -1/2