Answer:
 
 
Explanation:

  -1/4 -1/4  Subtract 1/4 from each side of the equation to isolate f.
 in order to subtract these fractions, we need
 in order to subtract these fractions, we need 
 to make both fractions have the same denominator.
 2 x 2 = 4, so we can just multiply the top and bottom
 by 2 to get -14/4. Now we can subtract the fractions.
 Since the denominators are the same now, ignore
 Since the denominators are the same now, ignore 
 the bottom and focus on subtracting the numerators. 
 -14 - 1 = -15.
 This is the final answer.
 This is the final answer.