Реши уравнения и запиши ответ

1. \(\cfrac{1}{11}+x=-3\cfrac{1}{2}\) ;

   \(x=\) [ ].

2. \(x-5\cfrac{7}{9}=-1\cfrac{1}{3}\) ;

   \(x=\) [ ].

3. \(-13\cfrac{11}{13}x=720\) ;

   \(x=\) [ ].

4. \(5\cfrac{5}{22}:x=-20\cfrac{10}{11}\) ;

   \(x=\) [ ].

Ответ:

1. \(x=\) [ ];
2. \(x=\) [ ];
3. \(x=\) [ ];
4. \(x=\) [ ].