You can
put this solution on YOUR website!Let a= Alex's age now
Ley g = George's age now
Let the other 3 be w, x, and y --> or rather let w+x be z, since we will let y be the person who has the birthday.
So, yza = 2450 --> eqn 1
y+z = 2g --> eqn 2
Let y be the person you talked to --> y = a-5
So, we have 4 things we do not know: a, g, y and z but only 3 equations, so I do not believe you can find out anything here. You need more information, relating the ages.
jon.