A Math Subject I Remember From Last Semester

We did a lot of math in the past semester, but there was one subject that I remember, because it was so hard. The subject was substitution and elimination with hard equations. I just did not get it. At the time I was really upset that I could not get the hang of it. I was also angry, because since I had so much trouble with it I got a C on my report card. When I told my algebra teacher he helped me, but I still didn't get it. Then I watched the videos. After that the math seemed a lot easier. 
   When we had to work on a practice test I understood it better. I even got a better grade. I felt good that I understood. Sometimes algebra can be hard, but if you do what you are supposed to it will be easier. Well that was my math memory from last sem