Solving Systems of Equations by Substitution

A system of equations is two or more equations that contain the same variables. Solving systems of equations by substitution is one method to find the point that is a solution to both (or all) original equations. Besides solving systems of equations by substitution, other methods of finding the solution to systems of equations include graphing, elimination and matrices.

Videos

$How to solve a system of equations using substitution.$
$How to solve a system of equations using substitution when both equations are in y=mx+b form.$
$How to solve a system of equations using substitution when one variable is already isolated.$
$How to solve a system of equations when neither equation has an isolated variable.$