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We will learn the general form of an equation of a plane: ax+by+cz=d or Ax+By+Cz+D=0. We also need to have the same number of equations and unknowns (variables) in order to solve the system of equations and no 2 planes can be parallel.

Next video in this series can be seen at:
https://youtu.be/v6QXTRPE8D4