document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=24730>Question 24730</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many gallons of a 30 percent alcohol solution must be mixed with 10 gallons of a 50 percent alcohol solution to make a 40 percent alcohol solution?  The equation is ((( Amount x Concentration = Quantity))) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13177 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=13177\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Since 30% = 30x<BR>\n" );
document.write( "Since 10 gallon of 50% = 50(10-x) <BR>\n" );
document.write( "Total = 40(10)<BR>\n" );
document.write( "Add it together:<BR>\n" );
document.write( "30x+50(10-x)=40(10)<BR>\n" );
document.write( "30x+500-50x=400<BR>\n" );
document.write( "-20x=-100<BR>\n" );
document.write( "x = 5<BR>\n" );
document.write( "Hence, there should be about 5 gallons of 30%.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );