Des amis sont au bar. Ils consomment 3 cocas et 9 cafés et payent 50.4 euros. Puis ils commandent 6 cocas et 6 cafés et payent 44.4 euros.

Quel est le prix d'un coca et le prix d'un café ?

  • Prix d'un coca :
  • Prix d'un café :

This is exercise number 1 in a series of 2 exercises.
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