document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=749386>Question 749386</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Plz some1 help me to solve this problem:\r<BR>\n" );
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document.write( "An 8 litre cylinder contains a mixture of oxygen<BR>\n" );
document.write( "and nitrogen, the volume of oxygen being 16% of<BR>\n" );
document.write( "the total volume. A few litres of the mixture is<BR>\n" );
document.write( "released and an equal amount of nitrogen is added.<BR>\n" );
document.write( "Then the same amount of the mixture as before is<BR>\n" );
document.write( "released and replaced by nitrogen for the second<BR>\n" );
document.write( "time. As a result, the oxygen content becomes 9% of<BR>\n" );
document.write( "the total volume. How many litres of mixture is<BR>\n" );
document.write( "released each time?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #456017 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=456017\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An 8 litre cylinder contains a mixture of oxygen<BR>\n" );
document.write( "and nitrogen, the volume of oxygen being 16% of<BR>\n" );
document.write( "the total volume. A few litres of the mixture is<BR>\n" );
document.write( "released and an equal amount of nitrogen is added.<BR>\n" );
document.write( "Then the same amount of the mixture as before is<BR>\n" );
document.write( "released and replaced by nitrogen for the second<BR>\n" );
document.write( "time. As a result, the oxygen content becomes 9% of<BR>\n" );
document.write( "the total volume. How many litres of mixture is<BR>\n" );
document.write( "released each time?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "let x = amt of mixture released each time, also the amt of nitrogen added<BR>\n" );
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document.write( "We know that if the mixture is 16% oxygen, it is 84% nitrogen<BR>\n" );
document.write( "then 9% oxygen means we have 91% nitrogen<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Write the decimal equation in the terms of nitrogen<BR>\n" );
document.write( ".84(8-2x) + 2x = .91(8)<BR>\n" );
document.write( "6.72 - 1.68x + 2x = 7.28<BR>\n" );
document.write( "-1.28x + 2x = 7.28 - 6.72<BR>\n" );
document.write( ".32x = .56<BR>\n" );
document.write( "x = .56/.32<BR>\n" );
document.write( "x = 1.75 liters of the mixture is released each time.<BR>\n" );
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