document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=469308>Question 469308</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can someone help me plssssssssss :)?\r<BR>\n" );
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document.write( "it takes carolyn 4 hr to type a final exam. it takes Elise 3 hr to do the same job. How long would it take them, working together, to do the typing? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321958 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321958\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> it takes carolyn 4 hr to type a final exam. it takes Elise 3 hr to do the same job. How long would it take them, working together, to do the typing?<BR>\n" );
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document.write( "Let x = time (hours) it takes for both<BR>\n" );
document.write( "then<BR>\n" );
document.write( "x(1/4 + 1/3) = 1<BR>\n" );
document.write( "multiplying both sides by 12:<BR>\n" );
document.write( "x(3 + 4) = 12<BR>\n" );
document.write( "x(7) = 12<BR>\n" );
document.write( "x = 12/7<BR>\n" );
document.write( "x = 1.7 hours<BR>\n" );
document.write( "or<BR>\n" );
document.write( "x = 1 hour and 43 minutes </SPAN>\n" );
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