document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=903694>Question 903694</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much water must be added to 30 litres of milk at 2 litres for $1.40 so as to have a mixture worth $0.50 a litre ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #548254 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=548254\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 30 liters of milk at 2 liters for $1.40 is worth 30 * $1.40 / 2 = $21.00\r<BR>\n" );
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document.write( "your cost per liter is equal to $21.00 / 30 = $.70 per liter.\r<BR>\n" );
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document.write( "You want your mixture to be worth $.50 per liter.\r<BR>\n" );
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document.write( "let x = the number of liters of water you need to add.\r<BR>\n" );
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document.write( "you want .50 * (x + 30) = $21.00\r<BR>\n" );
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document.write( "that's x + 30 liters of milk and water at $.50 per liter is equal to $21.00 which is the same value as 30 liters of pure milk milk at $.70 per liter.\r<BR>\n" );
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document.write( "your formula is:\r<BR>\n" );
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document.write( "$.50 * (x + 30) = $21.00\r<BR>\n" );
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document.write( "simplify to get:\r<BR>\n" );
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document.write( "$.50 * x + $15.00 = $21.00\r<BR>\n" );
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document.write( "subtract $15.00 from both sides of this equation to get:\r<BR>\n" );
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document.write( "$.50 * x = $6.00\r<BR>\n" );
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document.write( "divide both sides of this equation by $.50 to get:\r<BR>\n" );
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document.write( "x = 12\r<BR>\n" );
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document.write( "you need to add 12 liters of water to get a mixture with a value of $21.00.\r<BR>\n" );
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document.write( "total liters required = 30 milk + 12 water = 42 liters of mixture.\r<BR>\n" );
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document.write( "$.50 * 42 = $21.00 for 42 liters of milk and water mixture.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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