In $6$ years\textquotesingle{} time, Destin will be twice his nephew\textquotesingle s age. $6$ years ago, the ratio of Destin\textquotesingle s age to his nephew\textquotesingle s age was $5:1$. What is the sum of their ages in 10 years\textquotesingle{} time? 
Overseas Competition->Knowledge Point->Number Theory Modules