look at g(x)=x-8+6.
"add fractions or integers together it becomes" g(x)=x+[-2],
now look at "g(x)=x+[-2].
"remove the extra sign in front of (-2) now it becomes" g(x)=x-2.
now look at g(x)=x-2.
"move these terms to the left, [-x , 2] it becomes" g(x) - [x] + [2]=0.
answer is : g(x)-x+2=0 :)