Topic: Linear Systems and Solution Sets

Why Intersecting Lines Give a Unique Solution

Why a Contradiction Means No Solution

Two-Parameter Descriptions of Solution Sets

Two-Equation Systems as Line Intersections

Translating Verbal Constraints into Equations

Three Planes Sharing a Line

Three Planes with One Common Point

Systems as Simultaneous Constraints

Solving Two Equations by Elimination

Solving Two Equations by Substitution