Systems of Linear Equations
"Linear systems are important because we can solve them and because it turns out that the fundamental laws of physics are often linear."
— Richard Feynman
5-0 Linear Equations Recap5-0b Practice 5-1 Inspection 5-2 Graphing 5-2b Practice 5-3 Substitution 5-3b Practice 5-4 Elimination 5-4b Practice 5-4c Spiral Review Gap Check 5 Close the gap 5 
