Respuesta :

Answer:

30 - 11 = 19        19 CD's

Step-by-step explanation:


Answer:

30-11=x

x is what the friend has

or you can do x+11=30

x is what ur friend has still.

take the 11 over to the other side.

x=19

ur friend has 19 and you 30

19+11=30

Hope that helps!! :) Brainliest???