Question 852610

Let 2x = Christopher's age
Let x = Gabriela's age

2x - 9 = 5(x-9)

2x - 9 = 5x-45

2x-  5x = -45+9

-3x = -36

x = -36/-3

x = 12

Christopher 2x years old today or 2 times 12 which is 24 years old.