if you mean simplify then
first distribute the 3 in 3(2x-8) which is equal to 6x-24.
then you substract 11x from 6x-24 to get -5x-24
I'm not sure of the options for that question, but I can provide the simplest form.
First, let's follow PEMDAS and distribute within the inside of the parenthesis. 3(2x-8) = (3 * 2x) - (3 *[-8]) = 6x-24.
Then, let's take like terms and subtract -11+6x = -5x.
Therefore, putting them together, we get -5x-24.