The Special Project

(Task  #18)

This project requires 

collaboration  between the teams

The final solution of the project is the value of X

Type the value of X in the answer form

X = A + B + C - D - E

Each team is responsible for 

finding the correct value of a different variable (A,B,C,D,E)

Team 4

Find the correct value of D:

Who is the youngest of the following?