document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=617687>Question 617687</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help:  the textbook for a biology class costs $15 more than twice the cost of a used Algebra book.  If the cost of the two books together is $219.  Find the cost of each book.\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #388484 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=388484\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let A be the price of the algebra book<BR>\n" );
document.write( "Let B be the price of the biology book. <BR>\n" );
document.write( "You are told<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+%2B+B+=+219 ALIGN=MIDDLE  ALT=\"A+%2B+B+=+219\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=B+=+2A+%2B+15 ALIGN=MIDDLE  ALT=\"B+=+2A+%2B+15\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "substitute the value for B in this second equation into the first one<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+%2B+%282A%2B15%29+=+219 ALIGN=MIDDLE  ALT=\"A+%2B+%282A%2B15%29+=+219\"   DISABLED_style= \"max-width:90%; height:auto;\" > now simplify and solve for A<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3A+%2B+15+=+219 ALIGN=MIDDLE  ALT=\"3A+%2B+15+=+219\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3A+=+204 ALIGN=MIDDLE  ALT=\"3A+=+204\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+=+204%2F3 ALIGN=MIDDLE  ALT=\"A+=+204%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+=+68 ALIGN=MIDDLE  ALT=\"A+=+68\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "you have A, now solve for B using the second equation above </SPAN>\n" );
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