Question 500855
Let x be the sealevel


highest point be sea level  = x+15541  -> equation 1
lowest point below sea level = x - 104 -> equation 2

difference between the elevation of highest and lowest point = 
x + 15541 - (x -104)  -> equation 1 - equation 2
= x + 15541 - x + 104
= 15541+104 = 15645 feet

Difference between the highest and lowest point = 15645 feet
Height of city from sea level  = x+7149  -> equation 3

Difference between the elvation of hightes pioint and the city
 = x+15541 - x -7149  (equation 1 - equation 3)
  = 8392 feet


Difference between the elvation of lowest pioint and the city
= x+7149 - x +104   (equation 3 - equation 2)
= 7253 feet

Hence the elevation of the city is closer to the lowest point