okay .. let's say we use x as the number
A. 1/x - 4 = 2x - 37
B. ( I ain't really sure about this ) 
 
working: 1/x - 4 = 2x - 37
 -4 + 37 = 2x - 1/x
 33 = 2x/1 - 1/x
 33 = 2x² - 1
 _____
 x
 2x² - 1 = 33x
 2x² - 33x = 1
 x ( 2x - 33 ) = 1 or x ( 2x - 33 ) - 1 = 0