Respuesta :

Answer:

c=0.105 I believe.

Step-by-step explanation:

Answer:

c= 21/200

Step-by-step explanation:

hello :

c/2.1 + 1/5 = 1/4

c/2.1 + 1/5 -1/5 = 1/4 -1/5

c/2.1  = 1/20

c= 2.1/20

c= 21/200