The best answer would be that i<span>t deepens the physical description of the room. From the first paragraph of the passage, it describes what kind of life Dr. Pascal is and what type of person he is. This character has several unfinished works which is he gets frustrated at to the point of leaving it cluttered in the room. But this one research he worked hard on had a sentimental value. </span>
<span>Substitute for "a" and solve for "b":
7b = 10(b-24)
7b = 10b-240
3b = 240
b = 80 (# of calories in a banana)</span>