So first we would have to use the distributive property for 18(2n-6). When you distribute it, it comes to 9n+36n-108+13. Then we combine like terms which is 9n+36n and -108+13. 9n+36n = 45n. and -108+13 = -95. Since we can't simplify it any further the final answer is 45n-95. Hope this helps :)
