ЗАДАНИЕ №4 Решите линейное уравнение. \[-\frac{2}{5} \cdot x - \frac{2}{5} = \frac{7}{9}\] (x =)

Упростим уравнение: \[-\frac{2}{5}x - \frac{2}{5} = \frac{7}{9}\] \[-\frac{2}{5}x = \frac{7}{9} + \frac{2}{5}\] \[-\frac{2}{5}x = \frac{7 cdot 5 + 2 cdot 9}{45}\] \[-\frac{2}{5}x = \frac{35 + 18}{45}\] \[-\frac{2}{5}x = \frac{53}{45}\] \[x = \frac{53}{45} cdot \left(-\frac{5}{2}\right)\] \[x = -\frac{53 \cdot 5}{45 \cdot 2}\] \[x = -\frac{53}{9 \cdot 2}\] \[x = -\frac{53}{18}\] Ответ: -53/18