This is translation. We're going to represent Andrew as 'A' and Phil as 'P'.
A=6+P (key word: "is" means equal)
A+P=14
Now we substitute A in the equation as:
(6+P)+P=14
6+2P=14 ***added like terms***
-6 -6
------------
2P=8
---- ---
2 2
P=4
We just find out that Phil is 4 years old...BUT WHAT ABOUT ANDREW!!??? We are simply just going to substitute Phil's age into one of the equations as so:
A+P=14
A+4=14
-4 -4
-----------
A=10
Andrew is 10 years old and Phil is 4 years old! Have a blessed day!