document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=659734>Question 659734</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 13.The cost of a pen is P12 more than the cost of the pencil. If the cost of 10 pencils and 8 pens is P339, find the cost of each. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #410886 by </B><A HREF=/tutors/aboutme.mpl?userid=fcabanski><B>fcabanski(1391)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fcabanski><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=410886\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> pen = pencil+12 and 10pencil +8pen = 339.<P><BR>\n" );
document.write( "Two equations and two unknowns.  Use the first equation to substitute the value of pen in terms of pencils into the second equation and solve it.<P><BR>\n" );
document.write( "10pencil + 8(pencil+12) = 339<P><BR>\n" );
document.write( "10pencil +8pencil + 96 = 339<P><BR>\n" );
document.write( "18pencil = 243<P><BR>\n" );
document.write( "pencil = 13.5<P><BR>\n" );
document.write( "pen = pencil + 12 = 13.5+12 = 25.5<BR>\n" );
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