Since your solving for x you have to get x on the same side by itself.
x+16=9x
begin by subtracting x from both sides which gives you: 16=9x-x or 16=8x
then divide by 8 from both sides so: 16/8=8/8x
which equals 2=x
plug 2 back into the original equation to be sure:
2+16=9(2)
18=18 so x=2
The answer to your question would be the second option; "The pursuit of knowledge should include respect for moral boundaries".
The diction of Steinbeck here in apparently describing the dustbowl conditions of the Dirty Thirties is speaking of "tenant men" or presumably men who were tenant farmers perhaps who were allowed to live on the land in return for working it and that they "scuffed" their way home indicates that the dust was so thick they had to scuff but also perhaps that since they could barely make a living under the poor agricultural conditions they did not walk confidently but scuffed.
An adverbial phrase contains two in more words which take a syntactic function of modifying verbs, adjectives, or adverbs. Now it says in the question which "underlined group of words is an adverbial phrase," but the underlining does not seem to show up on here. It seems like in the last option, "almost anything" are two words that are modifying "buy." In my opinion, that would be the best option, however I still do not know which groups of words are underlined. I hope this helped you out!
By whom was the function presided over?