document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=179663>Question 179663</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemistry instructor has one solution that is 50% sulfuric acid and another<BR>\n" );
document.write( "that is 20% sulfuric acid. How much of each should she use to make 12 liters of a solution that is 30% acid?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #134581 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=134581\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A chemistry instructor has one solution that is 50% sulfuric acid and another<BR>\n" );
document.write( "that is 20% sulfuric acid. How much of each should she use to make 12 liters of a solution that is 30% acid? <BR>\n" );
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document.write( "let x and y be the amount of 50% and 20% solutions respectively<BR>\n" );
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document.write( "x+y=12.......eq 1<BR>\n" );
document.write( ".5x+.2y=.3(12)....eq 2<BR>\n" );
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document.write( "rewrite eq 1 to x=12-y and plug it into eq 2<BR>\n" );
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document.write( ".5(12-y)+.2y=3.6<BR>\n" );
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document.write( "6-.5y+.2y=3.6<BR>\n" );
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document.write( "-.3y=-2.4<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=8%29 ALIGN=MIDDLE  ALT=\"highlight%28y=8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >amount of 20% solution<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=12-8=4%29 ALIGN=MIDDLE  ALT=\"highlight%28x=12-8=4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >amount of 50% solution </SPAN>\n" );
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