Crow he said and I quote "my son and I have no absolute clue how to get the answer to a math problem by solving it we just know what the answer is."
Schools teach problem solving using equations, he says that he does not get answers by problem solving, that he just knows what the answer is.
So you are mistaken in how you read the post.
Can you get this answer without solving the problem, or do you just know it as well?
http://tutorial.math.lamar.edu/Classes/Alg/LinearApps_files/eq0008P.gif