You can put this solution on YOUR website! let Andrea's age be x and pat's age is 2x, Eight years ago their age is x-8 and 2x-8
Given that Pat's age = 10 andrea's age eight years ago.
then 2x-8 = 10 (x-8)
2x-8 = 10x -80
8x = 72
x = 9
2x =18
The girls is 9 years old.