document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=9517>Question 9517</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a mixture of concrete, there are 3 lb of cement mix for each pound of gravel. If the mixture contains a total of 140 lbs of these two ingredients, how many pounds of gravel are there? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #5206 by </B><A HREF=/tutors/aboutme.mpl?userid=DWL><B>DWL(56)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=DWL><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=5206\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let:\r<BR>\n" );
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document.write( "x = Cement<BR>\n" );
document.write( "y = Gravel\r<BR>\n" );
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document.write( "x + y =140\r<BR>\n" );
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document.write( "We also know that the cement is 3 times as much as the gravel, so:\r<BR>\n" );
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document.write( "x = 3y\r<BR>\n" );
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document.write( "So now substitute in the equation x + y = 140 and it becomes: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3y%2By=140 ALIGN=MIDDLE  ALT=\"3y%2By=140\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Combine Terms\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4y=140 ALIGN=MIDDLE  ALT=\"4y=140\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Divide both sides by 4\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=35 ALIGN=MIDDLE  ALT=\"y=35\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so the Gravel weighs 35 pounds.  We know there is 3 pounds of cement for every pound of gravel, so\"\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2A35=105 ALIGN=MIDDLE  ALT=\"3%2A35=105\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so the cement = 105.\r<BR>\n" );
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document.write( "Answer\"\r<BR>\n" );
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document.write( "35 Lbs. of Gravel<BR>\n" );
document.write( "105 Lbs. of Cement </SPAN>\n" );
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