Реши уравнения

1. \(\left(x+\dfrac{4}{7}\right)-\dfrac{9}{14}=\dfrac{1}{4}\) ;

2. \(\left(x-\dfrac{17}{36}\right)+\dfrac{9}{40}=\dfrac{13}{30}\) ;

3. \(2\dfrac{3}{4}-\left(x-3\dfrac{1}{8}\right)=1\dfrac{1}{6}\) ;

4. \(7\dfrac{5}{9}-\left(3\dfrac{4}{27}+x\right)=2\dfrac{5}{6}\) .

Ответ: 1) [ ]; 2) [ ]; 3) [ ]; 4) [ ].