From the January 2016 Common Core Algebra I Regents

Key questions to ask about this literal (only letters no numbers) equation;

But first a regular looking equation of 5x = 10

How do you solve 5x = 10? (s’s will say divide by 5)

So how many x’s? (5)

see below for an example of a literal equation

We divide both sides by r because that is how many t’s there are!! r t’s

How many r’s are in Prt?

There would be **Pt** r’s in **P**r**t** so we would start with

I = Prt and divide both sides by Pt

so that would be I/ Pt.

2 points 🙂