Mark M. answered 12/09/19
Retired college math professor. Extensive tutoring experience.
Let x = Jessica's age now
Then, Carlos' age now is x - 25
So, Jessica's age 9 years ago was x - 9 and Carlos' age 9 years ago was x - 34
x - 9 = 2(x - 34)
x - 9 = 2x - 68
-x = - 59
x = 59
Jessica is 59 and Carlos is 34.