document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=176462>Question 176462</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can you help with this problem:\r<BR>\n" );
document.write( "\n" );
document.write( "ten gallons of a 30% acid mixture is obtained by mixing a 20% solution with a 50% solution. How much of each must be used?\r<BR>\n" );
document.write( "\n" );
document.write( "i've tried creating two linear equations (one for total volume and one for concentration) but i don't know where to go from there. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #131581 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=131581\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ok lets call the amount of 20% and 50% solutions a and b respectively<BR>\n" );
document.write( ":<BR>\n" );
document.write( "a+b=10...........eq 1<BR>\n" );
document.write( ".2a+.5b=.3(10)...eq 2<BR>\n" );
document.write( ":<BR>\n" );
document.write( "rewrite eq 1 to a=10-b and plug this value into eq 2<BR>\n" );
document.write( ":<BR>\n" );
document.write( ".2(10-b)+.5b=3<BR>\n" );
document.write( ":<BR>\n" );
document.write( "2-.2b+.5b=3<BR>\n" );
document.write( ":<BR>\n" );
document.write( ".3b=1<BR>\n" );
document.write( ":<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28b=3.33%29 ALIGN=MIDDLE  ALT=\"highlight%28b=3.33%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >amount of 50% solution<BR>\n" );
document.write( ":<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28a=10-b=10-3.33=6.67%29 ALIGN=MIDDLE  ALT=\"highlight%28a=10-b=10-3.33=6.67%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >amount of 20% solution\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );