Problem solving find a missing side reverse surface area of cuboids

Finding a missing side using reverse surface area and algebra

[xfr]

thanks so much this was the only video i could find keep up the good work boss

[thetotaldramaking]

Thanks, much appreciated. This was a topic that slipped out my head and you have put it back in.

[zahrahfroggie]

Thank you so much, this was a great help !!

[ash_ok]

Everyone in class loves your intros btw sir