Question 415839
{{{-1 = -500xp/18000000 - 5p}}}....multiply all terms by {{{18000000}}} 


{{{-1*18000000 = -500xp*18000000/18000000 - 5p*18000000}}}


{{{-18000000 = -500xp - 90000000p}}}


{{{-18000000 = p(-500x - 90000000)}}}


{{{  p=-18000000/(-500x - 90000000)}}}


{{{  p=-18000000/-500(x + 180000)}}}


{{{  p=360/(x + 180000)}}}