It's a pretty basic algebraic problem, where's the fun?

This is where I regret cleaving my teacher with a chair in Maths and not going to lessons for 18 months.

I've worked out the age of the mother and son, but I can't help but think I've completly missed the point of the problem. What's the father got to do with it? Anyone care to enlighten me?

The father is currently located in the mother

 
	