Question 1048765
Cindy's age = C
Sally's age = S


C - 8 = 2(S - 8)
C = S + 5


Plug in the second equation into the first.


S + 5 - 8 = 2S - 16
S - 3 = 2S - 16
13 = S


Sally is 13 and Cindy is 18.