*looks at problem* What the... how? I would normally just distribute, but there is that pesky minus sign there, and you can't add 6 to 5n, they aren't like terms. What the hell is going on here!!?!?!

Oh wells, I took a stab at it.

Disclaimer: I'm not entirely sure if I'm doing this right, so if it's wrong, I don't take the blame. It's your fault for trusting me in the first place!

Now that that's out of the way, we can begin!

8n-(5n+6)=6

Since you can't really distribute here, nor can you combine the terms within the parentheses, I'm going to assume you just subtract 8n by what is in the parentheses.

Subtract 5n from 8n and viola!

3n-6=6

Now add six to both sides, to put n by itself.

3n=12

Now, we only need one n, so we divide both sides by three to get rid of the excess ns.

n=4