document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=723060>Question 723060</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a given type of concrete contains twice as much sand as cement and 1.5<BR>\n" );
document.write( " times as much gravel as sand.how many cubic yards of each must be used to make 9 yd3 of concrete? assume no loss of volume in mixing. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #443015 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39626)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=443015\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = amount sand<BR>\n" );
document.write( "y = amount cement<BR>\n" );
document.write( "z = amount gravel\r<BR>\n" );
document.write( "\n" );
document.write( "x/y=2. This means x=2y.  Also, means y/x=1/2, so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%2F2 ALIGN=MIDDLE  ALT=\"y=x%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "z/x=1.5.  This means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=1.5x ALIGN=MIDDLE  ALT=\"z=1.5x\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Want 9 yd^3 of concrete.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By%2Bz=9 ALIGN=MIDDLE  ALT=\"x%2By%2Bz=9\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Using the above substitutions allows to express everything in terms of just x.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B%28x%2F2%29%2B%28%283%2F2%29x%29=9 ALIGN=MIDDLE  ALT=\"x%2B%28x%2F2%29%2B%28%283%2F2%29x%29=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2B1%2F2%2B3%2F2%29x=9 ALIGN=MIDDLE  ALT=\"%281%2B1%2F2%2B3%2F2%29x=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "...continue from here to solve and finish for x, y, and z. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );