🚨 Lancement de la 3ème phase de tests : Je m'inscris au webinaire !

🚨 Lancement de la 3ème phase de tests :

Je m'inscris au webinaire !

On board $x=cl1$, the crew is composed of $nb1$ human or alien members. Knowing that there are $nb2$ aliens in the crew, how many humans are on board $x$?