The sum of the ages of carl and daria is twice as much as the difference between their ages. how old is daira if carl is nine years old and is a) older than she? b) younger than she? show your work using algebra

C + d = 2(c - d)
c = 9

9 + d = 2(9 - d)
9 + d = 18 - 2d
d + 2d = 18 - 9
3d = 9
d = 9/3
d = 3 <=== daira is 3 when carl is 9 years old and older then she

if carl is 9 years old and is younger then she ...I dont really understand this questioncarl is 9 and daira is 3possibly...their is a difference of 6 years in their agesso if carl is 9 and younger then she, the daira is 6 years older ?? making her 9 + 6 = 15not sure about this one the whole question throws me off

The answer is a good luck

Is there a picture of a graph or whatever that goes along with this?