Решите уравнение: a) −4.3x = 14,62; б) (11/15)y + (9/10) = (8/15).

a) \(-4.3x = 14.62\) \(x = 14.62 : (-4.3)\) \(x = -3.4\) б) \(\frac{11}{15}y + \frac{9}{10} = \frac{8}{15}\) \(\frac{11}{15}y = \frac{8}{15} - \frac{9}{10}\) \(\frac{11}{15}y = \frac{16}{30} - \frac{27}{30}\) \(\frac{11}{15}y = -\frac{11}{30}\) \(y = -\frac{11}{30} : \frac{11}{15}\) \(y = -\frac{11}{30} \cdot \frac{15}{11}\) \(y = -\frac{1}{2}\) Ответ: a) x = -3.4; б) y = -1/2