document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=125307>Question 125307</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395352495/algebrahomeworkh>algebra: structure and method: book1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Ingrid can rake our lawn in 90 min ad I can do it in 60 min. If she rakes for 15 min before I join her, how long will it take us to finish? PLEASE HELP!!! The answer is 30 min, but I don't know how to get there. HELP IS MUCH APPRICIATED!!!!!!!!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #92179 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=92179\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ingrid can rake our lawn in 90 min and I can do it in 60 min. If she rakes for 15 min before I join her, how long will it take us to finish?<BR>\n" );
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document.write( "Let x = time (in min) for you to finish the job<BR>\n" );
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document.write( "Let the completed job = 1<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F90 ALIGN=MIDDLE  ALT=\"15%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F90 ALIGN=MIDDLE  ALT=\"x%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F60 ALIGN=MIDDLE  ALT=\"x%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
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document.write( "Multiply equation by 180 to get rid of the denominators:<BR>\n" );
document.write( "180*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F90 ALIGN=MIDDLE  ALT=\"15%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 180*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F90 ALIGN=MIDDLE  ALT=\"x%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 180*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F60 ALIGN=MIDDLE  ALT=\"x%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 180(1)<BR>\n" );
document.write( "Cancel the denominators and you have:<BR>\n" );
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document.write( "2(15) + 2x + 3x = 180<BR>\n" );
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document.write( "30 + 2x + 3x = 180<BR>\n" );
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document.write( "2x + 3x = 180 - 30<BR>\n" );
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document.write( "5x = 150<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=150%2F3 ALIGN=MIDDLE  ALT=\"150%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 30 min </SPAN>\n" );
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