Chapter 2.1 difficulties and more

For the chapter 2.1 I remember how to do the secondary one method and now i see that secondary 2 chapters for this is quite difficult and some of the questions i don't understand.The difficulties that i face is confusion as this chapter need to do many arrows. This makes me confuse which is which.For this kind of chapter maybe some of the classmates need help and they need extra lesson jus for the some of them so i am looking forward for mathematics remedial lesson