If christopher consumed 600 calories by drinking x number of sodas, which expression represents the number of calories in each soda?

Can someone me out here and the tell me the greatest common factor

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

Answer! if you don’t mind, can you explain