<PRE><B>Question 694323</B>
OK.  
Notebook costs n cents
Pen costs n+5 cents
Marker costs n+10 cents

6 notebooks cost 6n cents
5 pens cost 5(n+5) cents
4 markers cost 4(n+10) cents
Sooooo
Marty spent 6n+5(n+5)+4(n+10) cents---Lets get rid of parens
6n+5n+25+4n+40=
15n+65 cents

Hope this helps---ptaylor</PRE>