80=11x+1
We move all terms to the left:
80-(11x+1)=0
We get rid of parentheses
-11x-1+80=0
We add all the numbers together, and all the variables
-11x+79=0
We move all terms containing x to the left, all other terms to the right
-11x=-79
x=-79/-11
x=7+2/11