[sheetsjen]

If you add 176 to half a # you get 199

[CaptainRich]

If you add 176 to half a # you get 199

And this means...

[cool_dude]

When you have these kind of questions all you have to do is come up with some sort of equation. So let x represent are number. The question says half a number so then we know its x/2 and then it says if we add 176 to that we get 199 so the equation looks like this:
x/2 + 176 = 199

Now you easily solve for x by isolating for x.

[s_cianci]

Solve the problem by reversing the steps ; reverse the "add 176" part first, then reverse the "half" part. You start with the 199.