**Remember from your arithmetic days what this means?**

**That's three 2's all multiplied together:**

**As you know by now, in Pre-Algebra, we work with that unknown guy... Mr. X!**

**The thing to remember is that x is a number -- we just don't know which one.**

**So, all the stuff you learned in arithmetic works here too!**

**What if we stick a 5 in front of this thing?**

**The 5 is called a coefficient (because it's a number in front of an x guy) and it's just multiplied in with the x's.)**

**Remember that x is some mystery number...What would we get if we let x = 3?**