document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908763>Question 908763</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A brick mason requires 12 hours to lay a garden wall by himself. After the mason and his helper worked for 3 hours, the mason left to finish a different job. The helper took 12 more hours to finish the job. How long would it have taken for the helper working alone to do the whole job? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551301 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=551301\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One  worker works alone for  12/x<BR>\n" );
document.write( "Two workers work together for 3/x and 3/12 since he can do the job alone in 12<BR>\n" );
document.write( "One worker worked 3 hours with his partner and 12 hours alone for a totel of 15 hours<BR>\n" );
document.write( "12/x+3/x+3/12=1<BR>\n" );
document.write( "15/x+3/12=1<BR>\n" );
document.write( "15/x+=1-3/12<BR>\n" );
document.write( "15/x+=0.75<BR>\n" );
document.write( "15=0.75*x<BR>\n" );
document.write( "15/0.75=x<BR>\n" );
document.write( "x=20 hours if he had done the job alone<BR>\n" );
document.write( "check<BR>\n" );
document.write( "12/20+3/20+3/12=1<BR>\n" );
document.write( "0.6+0.15+0.25=1<BR>\n" );
document.write( "1=1<BR>\n" );
document.write( "ok<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );