Question 845116
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Hi
let x be the previous population
{{{14850000/x = 14850000/(x+2200) + 75}}}  |Multiplying thru by x(x+2200) so as all denominators = 1
   14850000(x+2200) = 14850000x + 75x(x+2200)
   75x^2 + 75*2200x - 14850000*2200 = 0
     x^2 + 2200x - 198000*2200 = 0
   x^2 + 2200x  -435600000= 0
{{{x = (-2200 +- sqrt( 1747240000 ))/(2) }}}
{{{x = (-2200 +- 41800)/(2) }}}
    x = 19,800 (Tossing out the negative solution for unit measure)
Population now is : 22,000
CHECKING our answer***
  $750 = $675 + $75