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