4. Реши уравнения: 1) \(\frac{10}{21}x = \frac{5}{7}\) 2) \(\frac{1}{3} + 6x = 1\)

1) \(\frac{10}{21}x = \frac{5}{7}\) \(x = \frac{5}{7} : \frac{10}{21}\) \(x = \frac{5}{7} \cdot \frac{21}{10}\) \(x = \frac{5 \cdot 21}{7 \cdot 10}\) \(x = \frac{105}{70} = \frac{3}{2} = 1.5\) Ответ: \(x = 1.5\) 2) \(\frac{1}{3} + 6x = 1\) \(6x = 1 - \frac{1}{3}\) \(6x = \frac{3}{3} - \frac{1}{3} = \frac{2}{3}\) \(x = \frac{2}{3} : 6\) \(x = \frac{2}{3} \cdot \frac{1}{6}\) \(x = \frac{2}{18} = \frac{1}{9}\) Ответ: \(x = \frac{1}{9}\)