Answer:
This is obviously a school problem, so I'll give a hint.
Explanation:
So the question is 3 1/4=1/2+w, and your trying to find what w is. But because this is a hard(ish) problem to explain, we're going to use an easier example:
Ex:
1+_=2
In this case, we don't know what 1+ something = two is. The problem itself is pretty easy, as most of instinctively know that 1 plus 1 is equal to 2. Its something that's been taught to use when we were young. But if you look closer, you realize that 1+_=2, is also equal to _=2-1. in a equation, you can add in any order. 1+2, and 2+1 is the same thing. They are both equal to 3. The same is said to 3 1/4=1/2+w. You need to know what 3 1/4-w=1/2, or what 1/2-3 1/4=w.