My age is $$3$$ years less than $$5$$ times my sister\textquotesingle s age. If I am $$27$$, the sum of my age and my sister\textquotesingle s age is． 
Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems->Differences and Multiples in Age Problems
My age, $$27$$, is $$3$$ years less than $$5$$ times my sister\textquotesingle s age, so $$30$$ is $$5$$ times her age. Thus, my sister is $$6$$. The sum of our ages is $$27+6=33$$. 