Here is the summary formatted as requested:
• The document covers different types of equations for lines and planes in R³ space.
• It explains vector, parametric, and symmetric equations for lines in 3D.
• The Gauss-Jordan elimination method is demonstrated for solving systems of linear equations.
• An example problem involving ages in a family is solved using a system of linear equations.
• GeoGebra is used to verify solutions to the linear systems.