Original equation: 5c-4-2c+1=8c+2
The first thing you want to do is combine like terms:
3c-3=8c+2
Then. get the variable on its own side by subtracting the 3c from the left and subtracting the 2 from the right:
-5=5c
Divide both sides by 5 to get c by itself:
-1=c
The death of Piggy has symbolic value. It shows the death of innocence of these boys, and the end of all rationality and civilized behavior.
The text structure is chronological, if that's what you are asking.