Simply the expression 2 (6+3n) - 4

8+6n

Step-by-step explanation:

First, distribute the 2 into the parenthesis.

2 (6) + 2 (3n) - 4

Then, multiply the numbers.

12+6n-4

Now add (subtract in this case) the common multiples.

12-4 = 8

8+6n

Since you can no longer simplify the equation, this is the answer ...

8+6n