document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1016090>Question 1016090</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sam bought two books.one book cost 4.00$ more than three times other.together,the two books cost him 72$ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #632442 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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/cgi-bin/show-face.mpl?user=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=632442\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "What do you want to know? Always post your question.<BR>\n" );
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document.write( "X=cost of book 1; Y=cost of book 2=3X+$4.00 <BR>\n" );
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document.write( "X+Y=$72 . Substitute (3X+$4) for Y.<BR>\n" );
document.write( "X+(3X+$4)=$72<BR>\n" );
document.write( "4X=$68<BR>\n" );
document.write( "X=$17<BR>\n" );
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document.write( "ANSWER 1: Book 1 cost $17.<BR>\n" );
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document.write( "Y=3X+$4=3($17)+$4=$51+$4=$55<BR>\n" );
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document.write( "ANSWER 2: Book 2 cost $55.<BR>\n" );
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document.write( "CHECK:<BR>\n" );
document.write( "X+Y=$72<BR>\n" );
document.write( "$17+$55=$72<BR>\n" );
document.write( "$72=$72<BR>\n" );
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document.write( " </SPAN>\n" );
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