n+6+3n-6=8(7+4n)-4(2n-1)

Solution for n+6+3n-6=8(7+4n)-4(2n-1) equation:

n+6+3n-6=8(7+4n)-4(2n-1)

We simplify the equation to the form, which is simple to understand 
n+6+3n-6=8(7+4n)-4(2n-1)

Reorder the terms in parentheses
n+6+3n-6=+(+56+32n)-4*(2n-1)

Remove unnecessary parentheses
+n+6+3n-6=+56+32n-4+*(+2n-1+)

Reorder the terms in parentheses
n+6+3n-6=+56+32n+(-8n+4)

Remove unnecessary parentheses
+n+6+3n-6=+56+32n-8n+4

We move all terms containing n to the left and all other terms to the right. 
+1n+3n-32n+8n=+56+4-6+6

We simplify left and right side of the equation. 
-20n=+60

We divide both sides of the equation by -20 to get n. 
n=-3