Ответ:

4.1. \(6(x-8)-5x=8\) \(6x-48-5x=8\) \(x=56\).

4.2. \(6(x-2)-5x=2\) \(6x-12-5x=2\) \(x=14\).

4.3. \(6(x-2)=5x+2\) \(6x-12=5x+2\) \(x=14\).

4.4. \(3(x-7)=2x+7\) \(3x-21=2x+7\) \(x=28\).

Ответ: 4.1) \(56\); 4.2) \(14\); 4.3) \(14\); 4.4) \(28\).