Verified Answer :

leeyah188

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

LittleEmu

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! :)

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