document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=92540>Question 92540</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am just drawing a blank on what the 2 equations would be for this problem.  Once I get them. I can solve the problem.\r<BR>\n" );
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document.write( "Simone can build a treehouse in 15 hours.  Working together Simone and Tyrese can build a treehouse in 7 hours.  How many hours would Tyrese take to build the treehouse working alone?\r<BR>\n" );
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document.write( "I have S=15<BR>\n" );
document.write( "S+T=7  but I know this isn't correct.\r<BR>\n" );
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document.write( "Please help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #67366 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=67366\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Simone can build a treehouse in 15 hours. Working together Simone and Tyrese can build a treehouse in 7 hours. How many hours would Tyrese take to build the treehouse working alone? <BR>\n" );
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document.write( "Simone DATA:<BR>\n" );
document.write( "Time = 15 hrs/job ; Rate = 1/15 job/hr<BR>\n" );
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document.write( "Together DATA:<BR>\n" );
document.write( "Time = 7 hrs/job ; Rate = 1/7 job/hr<BR>\n" );
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document.write( "Tyrese DATA:<BR>\n" );
document.write( "Time = x hrs/job ; Rate = 1/x job/hr<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "rate + rate = rate together<BR>\n" );
document.write( "1/15 + 1/x = 1/7<BR>\n" );
document.write( "Multiply thru by 105x to get:<BR>\n" );
document.write( "7x + 105 = 15x<BR>\n" );
document.write( "8x = 105<BR>\n" );
document.write( "x = 13.125 hrs (time it takes Tyrese to build the tree house alone)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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