Решите уравнение: 1) \(\frac{5}{16}+x=\frac{9}{16}\); 2) \(\left(\frac{17}{28}-x\right)-\frac{11}{28}=\frac{3}{28}\); 3) \(\frac{x}{25}-\frac{4}{25}=\frac{18}{25}\).

1. \(x=\frac{9}{16}-\frac{5}{16}=\frac{4}{16}=\frac14\).
2. \(\frac{17}{28}-\frac{11}{28}-x=\frac{3}{28}\); \(\frac{6}{28}-x=\frac{3}{28}\); \(x=\frac{3}{28}\).
3. \(\frac{x-4}{25}=\frac{18}{25}\); \(x-4=18\); \(x=22\).

Ответ: 1) \(x=\frac14\); 2) \(x=\frac{3}{28}\); 3) \(x=22\).