document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=161149>Question 161149</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car radiator has a capacity of 16 quarts and is filled with a 25% antifreeze solution.  How much must be drained off and replaced with pure antifreeze to obtain a 40% antifreeze solution? </SPAN>\n" );
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document.write( "Let x = amount drained off and replaced with pure antifreeze<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".25(16-x) + x = .40(16)<BR>\n" );
document.write( "4 - .25x + x = 6.4<BR>\n" );
document.write( "4 + .75x = 6.4<BR>\n" );
document.write( ".75x = 2.4<BR>\n" );
document.write( "x = 3.2 quarts </SPAN>\n" );
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