Algebra Substitution

Here is a link explaining substitution:
https://docs.google.com/presentation/d/1XsdlWhJFcjg2EOgoddUyjtyCQIbQva7doLJzL2uuoQI/edit#slide=id.p


This week we have been doing substitution in maths.  It has been cool.  I liked it.  It was interesting.  I did the substitution.  I did it good.  So did other peeps.  We did some group work as well, and it was... interesting.