document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1004755>Question 1004755</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have a quiz tomorrow and this is a problem on my homework, I could really use some help!\r<BR>\n" );
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document.write( "A chemist has a 60% acid solution and a 20% acid solution. How many millimeters of each should be used to make 140ml of a 35% acid solution? Let x represent the number of ml of the 60% acid solution. \r<BR>\n" );
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document.write( "Thanks so much!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621127 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=621127\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A chemist has a 60% acid solution and a 20% acid solution. How many millimeters of each should be used to make 140ml of a 35% acid solution? Let x represent the number of ml of the 60% acid solution. <BR>\n" );
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document.write( "Using two equations::<BR>\n" );
document.write( "Quantity:: s + t = 140 ml<BR>\n" );
document.write( "Acid Eq:::0.60s + 0.20t = 0.35*140<BR>\n" );
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document.write( "Modify for elimination:<BR>\n" );
document.write( "60s + 60t = 60*140<BR>\n" );
document.write( "60s + 20t = 35*140<BR>\n" );
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document.write( "Subtract and solve for \"t\"::<BR>\n" );
document.write( "40t = 25*140<BR>\n" );
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document.write( "t = 87.5 ml (amt. of 20% solution needed<BR>\n" );
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document.write( "s = 140-t = 52.5 ml (amt. of 60% solution needed)<BR>\n" );
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document.write( "OR<BR>\n" );
document.write( "Using one equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.60x + 0.20(140-x) = 0.35*140<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "60x + 20*140 - 20x = 35*140<BR>\n" );
document.write( "40x = 15*140<BR>\n" );
document.write( "x = 52.5 ml (amt. of 60% solution needed)<BR>\n" );
document.write( "140-x = 87.5 ml (amt. of 20% solution needed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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