Why We Multiply by the Inverse to Solve Congruences

This Proof Avoids Modular Inverses

Part 3: Inverting a Rational Function

The Hidden Trick Behind Three-Variable Diophantine Equations

Part 2: Inverting a Rational Function

Don't Waste Time on the Full CRT Algorithm

The Identity That Cracks This Number, Can You Use It?

Part 4: Inverting a Rational Function

There's an Exact Formula for This And It's Just a Square Root