document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=438100>Question 438100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here is the question from my book.... Brad is performing an experiment in chemistry class at the University of North Carolina. He needs to mix 20 liters of 40% acid solution with a 70% acid solution to get a mixture that is 50% acid. How many liters of the 70% acid solution should he use?\r<BR>\n" );
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document.write( "I think the answer is 15 but when i tried to work it out I got confused. this is what I have so far: 20/15 = 1.333333333, 1.333333333/70= 50, 1.333333333 X 70 = 50, well anyways you see I didn't get to far.<BR>\n" );
document.write( "thank you.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #303035 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=303035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> He needs to mix 20 liters of 40% acid solution with a 70% acid solution to get a<BR>\n" );
document.write( " mixture that is 50% acid.<BR>\n" );
document.write( " How many liters of the 70% acid solution should he use? <BR>\n" );
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document.write( "Let x = amt of 70% solution required<BR>\n" );
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document.write( "Write an amt of acid equation in decimal form:<BR>\n" );
document.write( ".40(20) + .70x = .50(x+20)<BR>\n" );
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document.write( "8 + .70x = .50x + 10<BR>\n" );
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document.write( ".70x - .50x = 10 - 8<BR>\n" );
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document.write( ".20x = 2<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F.2 ALIGN=MIDDLE  ALT=\"2%2F.2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 10 liters of 70% solution<BR>\n" );
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document.write( "Confirm the solution<BR>\n" );
document.write( ".4(20) + .7(10) = .5(10+20) <BR>\n" );
document.write( "8 + 7 = .5(30) </SPAN>\n" );
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