document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1127833>Question 1127833</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many litres of a solution containing 18% sulphuric acid by volume, and how many litres of another solution containing 25% sulphuric acid must be combined to make 550 L of solution containing 23% sulphuric acid? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #744307 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=744307\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Algebraically, solve the equation that says x liters of .18 solution plus (550-x) liters of .25 solution yields 550 liters of .23 solution:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18%28x%29%2B0.25%28550-x%29+=+0.23%28550%29 ALIGN=MIDDLE  ALT=\"0.18%28x%29%2B0.25%28550-x%29+=+0.23%28550%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "I'll let you do the algebra to finish.<br><BR>\n" );
document.write( "But here is a method for finding the answer that, if you understand it, will get you to the answer to a problem like this much faster and with much less work.<br><BR>\n" );
document.write( "Think of starting with the 18% solution and adding some 25% solution, stopping when the mixture is 23%.  The 23% is 5/7 of the way from 18% to 25%; that means 5/7 of the mixture needs to be the 25% solution.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%2F7%29%28550%29+=+2750%2F7 ALIGN=MIDDLE  ALT=\"%285%2F7%29%28550%29+=+2750%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >; <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2F7%29%28550%29+=+1100%2F7 ALIGN=MIDDLE  ALT=\"%282%2F7%29%28550%29+=+1100%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The mixture needs to have 2750/5 liters of 25% solution and 1100/7 liters of 18% solution. </SPAN>\n" );
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