My Algebra and simplifying link

 DLO Today I was learning about algebra. I found this hard but I got help. My next steps are to pay a paying a tension to my teacher when it's maths.

https://docs.google.com/document/d/1KyZP_NTtY0fbhJG_ARdeW9sH5OviS04IH5I-ZTSrtD0/edit

Why should we be silent during test