a) \(\frac{1}{3} = \frac{x}{3}\); б) \(\frac{2}{6} = \frac{x}{18}\); в) \(\frac{5}{5} = \frac{x}{x}\); г) \(\frac{10}{30} = \frac{x}{60}\)?

Решим данные уравнения: a) \(\frac{1}{3} = \frac{x}{3}\) \(x = \frac{1 \cdot 3}{3} = 1\) б) \(\frac{2}{6} = \frac{x}{18}\) \(x = \frac{2 \cdot 18}{6} = \frac{36}{6} = 6\) в) \(\frac{5}{5} = \frac{x}{x}\) \(1 = \frac{x}{x}\) \(x\) - любое число, кроме 0. г) \(\frac{10}{30} = \frac{x}{60}\) \(x = \frac{10 \cdot 60}{30} = \frac{600}{30} = 20\)