document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=668896>Question 668896</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One printer takes 4 hours to complete a job. Another printer can do the same job in 3 hours. When the job runs on both printers, how many hours will it take to complete? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #415934 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=415934\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x=number of hours it takes both printers working together to do the job<BR>\n" );
document.write( "One printer prints at the rate of 1/4 of the job per hour<BR>\n" );
document.write( "The other printer prints at the rate of 1/3 of the job per hour\r<BR>\n" );
document.write( "\n" );
document.write( "Together, they print at the rate of 1/4 + 1/3=3/12 + 4/12=7/12 of the job per hour<BR>\n" );
document.write( "So, our equation to solve is:<BR>\n" );
document.write( "(7/12)*x=1 (1 job, that is)<BR>\n" );
document.write( "7x=12<BR>\n" );
document.write( "x=12/7 hr=1 5/7 hr<BR>\n" );
document.write( "CK<BR>\n" );
document.write( "(1/4)*(12/7)+(1/3)*(12/7)=?1<BR>\n" );
document.write( "3/7 + 4/7=1<BR>\n" );
document.write( "1=1\r<BR>\n" );
document.write( "\n" );
document.write( "Hope this helps--ptaylor<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );