what is 2(-8x-3)+18x

First of all, it's "answer," but okay.

We'll use Distribution to simplify. 2(-8x-3)+18x = 2(-8x)-2(3)+18x. This is equal to -16x-6+18x. Simplify that, to get our answer.

Therefore, 2x-6 is our solution.

P.S. What grade of math is this?

Look at this cheater, demanding us to give them an "anser". Probably failed first grade math. I'll give you an anser to you iq, and its very low