QUESTION:-
 In a group of 80 employees, the number of employees who are engineers is twice that of the employees who are MBAs. The number of employees who are not engineers is 32 and that of those who are not MBAs is 56. The number of employees who are both engineers and MBAs is twice that of the employees who are only MBAs. How many employees are neither engineer nor MBAs?

{Please don't provide any weblink or certified answer ... I want only a well-explained solution from the experts}