Question 966044
n books at price {{{7/n}}} R per BOOK.


Price Increase!   {{{7/n+0.1}}}    R per BOOK is the new price.  Number of books to receive is now {{{n-8}}}.


The cost stayed the same before price increase and after the price increase.
{{{PRICE*COUNT=COST}}};


{{{7=theCost}}}
{{{highlight_green(7=(7/n+0.1)(n-8))}}}


{{{7n=(7+0.1n)(n-8)}}}
{{{7n=7n+0.1n-56-0.8}}}
{{{0=0.1n-56.8}}}
{{{0.1n=56.8}}}
{{{highlight(n=568)}}}