Question 67252
(100P-4000)/100P = .3    P=?
{{{(100P-4000)/100P=.3}}}
{{{100P(100P-4000)/100P=100P(.3)}}}
{{{100P-4000=30P}}}
{{{100P-100P-4000=30P-100P}}}
{{{-4000=-70P}}}
{{{-4000/-70=-70P/-70}}}
{{{400/7=P}}}
{{{57.14285714=P}}}  Round off to where ever your teacher expects.
Happy Calculating!!!!