document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87918>Question 87918</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0618044302/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> How many litres of water must be added to 50 L of a 30% acid solution in order to produce a 20% acid solution? </SPAN>\n" );
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document.write( "Amt of 30% solution = 50 L; amt of active ingredient = 0.30*50 = 15 L<BR>\n" );
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document.write( "Amt of water added = x L ; amt of active ingredient = 0x = 0<BR>\n" );
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document.write( "Amt of 20% solution = (50+x) L; amt of active ingredient = 0.2(50+x) = 10+0.2x L<BR>\n" );
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document.write( "EQUATION: <BR>\n" );
document.write( "active + active = active<BR>\n" );
document.write( "15 + 0 = 10 + 0.2x<BR>\n" );
document.write( "5 = 0.2x<BR>\n" );
document.write( "x= 25 L (amount of water that must be added)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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