(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data, and relevant equations

How is A6 arrived at and *how* did they get the "Q" in A6?

2. Relevant equations

See above

3. The attempt at a solution

Objective: Rid A1 of L. They simply substituted "C" in A2 into A1. But how did they get rid of the L? I don't quite get the algebraic manipulation...please help

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Simple algebra-calculus question

**Physics Forums | Science Articles, Homework Help, Discussion**