20 years since I was in high school. How do I break this down? 
$-5 = 2x + 5$

I want to "re-start" my mathematical education.  I am needing it more and more at work.  A co-worker asked me to break that down (he couldn't remember either).
Where should I start?  What books?  
Thanks!

Hint: In general for such one variable problems, where you need to find the value of the variable from a given single equation, you collect terms in the variable on one side of the equation and terms not containing the variable on the other side. Then divide the equation by the coefficient of the variable ($x$ in this case) to solve for it.
