No given information.
No answer possible.
P+ b= 207
p-59= b
P+ (P-59)=207
2p-59=207:
2p =207+59
p=266/2
P=133
b=133-59
b=74
psych books= 133
biology books= 74
74+133= 207(Check)
2/7 because there is a total of 7 people and they are 2 out of that 7
Hmmm recall, p=3, and "p" is the distance from the vertex to either, the focus or directrix, so if the focus is 3 units to one-side of the vertex, the directrix is 3 units to the other side
check the picture below