Solving Systems by Graphing
https://www.youtube.com/watch?v=9MPUSWUyaYU
Solving Systems by Setting them Equal
https://www.youtube.com/watch?v=e-wQbzpTtak
Solving Systems by using Substitution
https://www.youtube.com/watch?v=YriMMWbndn0&t=1s
Solving Systems by using Elimination