-2(2-7n)-12n=-6+3(n+1)

Solution for -2(2-7n)-12n=-6+3(n+1) equation:

-2(2-7n)-12n=-6+3(n+1)

We simplify the equation to the form, which is simple to understand 
-2(2-7n)-12n=-6+3(n+1)

Reorder the terms in parentheses
+(-4+14n)-12n=-6+3*(n+1)

Remove unnecessary parentheses
-4+14n-12n=-6+3+*(+n+1+)

Reorder the terms in parentheses
-4+14n-12n=-6+(+3n+3)

Remove unnecessary parentheses
-4+14n-12n=-6+3n+3

We move all terms containing n to the left and all other terms to the right. 
+14n-12n-3n=-6+3+4

We simplify left and right side of the equation. 
-1n=+1

We divide both sides of the equation by -1 to get n. 
n=-1