Step-by-step explanation:
A1=8
A2=A1+5 plug 8 into A1 here. After getting the value, put into next equation. And repeat until you get A5
A3=A2+5
A4=A3+5
A5=A4+5
So -x can also represent -1
You want to divide both sides by -1 so you can get -x to be just x
-x divided by -1 = x
-24 divided by -1 = 24
Your answer is x=24