document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934141>Question 934141</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you wish to increase the percent of acid in 60 mL of a 25% acid solution in water to 35% acid, how much pure acid must you add? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #567255 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=567255\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x = amount of acid you need to add to your solution to make it 35% acid.\r<BR>\n" );
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document.write( "your new solution will be equal to 60 + x.\r<BR>\n" );
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document.write( "you currently have 15 ml of acid because .25 * 60 = 15.\r<BR>\n" );
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document.write( "if you add x to that, you will get x + 15 ml of acid.\r<BR>\n" );
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document.write( "if you add x to 60, you will get x + 60 of total solution.\r<BR>\n" );
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document.write( "x + 15 must be equal to 35% of 60 + x in your new solution.\r<BR>\n" );
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document.write( "your equation is x + 15 = .35 * (60 + x)\r<BR>\n" );
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document.write( "simplify this equation to get x + 15 = .35 * 60 + .35 * x\r<BR>\n" );
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document.write( "subtract .35 * x from both sides of the equation and subtract 15 from both sides of the equation and you get x - .35 * x = .35 * 60 - 15.\r<BR>\n" );
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document.write( "simplify that equation to get .65 * x = 6.\r<BR>\n" );
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document.write( "divide both sides of that equation by .65 to get x = 6/.65 = 9.l230769231.\r<BR>\n" );
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document.write( "that's your solution.\r<BR>\n" );
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document.write( "you start with 15 ml of acid in 60 ml of solution.\r<BR>\n" );
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document.write( "15 / 60 = .25 which is the current ratio.\r<BR>\n" );
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document.write( "add 9.1230769231 of acid and you get 15 + 9.1230769231 ml of acid in a total solution of 60 + 9.1230769231 ml.\r<BR>\n" );
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document.write( "that simplifies to 24.1230769231 ml of acid in a total solution of 69.1230769231 ml.\r<BR>\n" );
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document.write( "24.1230769231 / 69.1230769231 = .35\r<BR>\n" );
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document.write( "your solution is now 35% acid.\r<BR>\n" );
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