Lecture 8 (Intermediate Algebra) Solving Systems of Equations

To solve a system of three equations in three unknowns, the lecture's general rule says you need:

1. A.At least one more equation than unknowns to overdetermine the system
2. B.Exactly as many equations as unknowns
3. C.Fewer equations than unknowns, to leave a parameter free
4. D.Any number of equations, as long as one is linear