Respuesta :

There’s not much information but an answer could be 6 (C) cars would be left after renting 6 (R) of them.
znk

Answer:

C = 12 - R  

Step-by-step explanation:

    Cars available =    12

Less cars rented = -         R

        Cars left (C) =    12 -  R

Karen would have C =   12 -  R  cars left.