<PRE><B>Question 121570</B>
Let x be the number of books printed and sold.


The cost to the publisher is {{{C=9.50x+47736}}}


The publisher&#39;s revenue is {{{R=23x}}}


The question is: what is x such that C = R?


{{{9.50x+47736=23x}}}


Add -23x to both sides


{{{-13.5x+47736=0}}}


Add -47736 to both sides


{{{-13.5x=-47736}}}


Divide by -13.5


{{{x=3536}}}


</PRE>