Anne has some apples. Maria has $$20$$ apples more than Anne. Altogether they have $$44$$ apples. How many apples does Anne have?（Adapted from $$2005$$ Math Kangaroo Problem, Levels $$1-2$$, Question \#$$15$$） 
Overseas Competition->Knowledge Point->Word Problem Modules->Questions Involving Sum, Difference and Multiples->Problems Involving Sum and Difference