Please help me on this question as soon as possible….

18+27f-39 *distribute* 27f-21 *add like terms*

First, you want to use the distributive property on 3(9f - 13):  18 + 27f - 39  Then, you need to subtract 18 from 39 (you will get a negaitve number):  27f - 21  Your answer should be the bottom left one: 27f - 21 Hopefully that helped! :)