document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=734532>Question 734532</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "A lab needs to make 100 gallons of an 18% acid solution by mixing a 12% acid solution with a 20% solution. How many gallons of each solution are needed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #449019 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley79><B>checkley79(3341)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley79><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=449019\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 100*.18=.20x+.12(100-x)<BR>\n" );
document.write( "18=.20x+12-.12x<BR>\n" );
document.write( ".20x-.12x=18-12<BR>\n" );
document.write( ".08x=6<BR>\n" );
document.write( "x=6/.08<BR>\n" );
document.write( "x=75 gallons of 20% acid is used.<BR>\n" );
document.write( "100-75=25 gallons of 12% acid is used.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( "100*18=.20*75+.12*25<BR>\n" );
document.write( "18=15+3<BR>\n" );
document.write( "18=18<BR>\n" );
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