4.334 Найдите корень уравнения: a) -7,42z = 70,49; б) z : (-4,04) = -8,5; в) 9,43 * (-с) = 22,632; г) -$$\frac{4}{7}$$c = $$\frac{9}{14}$$;

a) \(-7.42z = 70.49\) \(z = \frac{70.49}{-7.42}\) \(z = -9.5\) б) \(z : (-4.04) = -8.5\) \(z = -8.5 \cdot (-4.04)\) \(z = 34.34\) в) \(9.43 \cdot (-c) = 22.632\) \(-c = \frac{22.632}{9.43}\) \(-c = 2.4\) \(c = -2.4\) г) \(-\frac{4}{7}c = \frac{9}{14}\) \(c = \frac{9}{14} : (-\frac{4}{7})\) \(c = \frac{9}{14} \cdot (-\frac{7}{4})\) \(c = -\frac{9 \cdot 7}{14 \cdot 4}\) \(c = -\frac{63}{56}\) \(c = -\frac{9}{8}\) \(c = -1\frac{1}{8}\)