document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908463>Question 908463</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A petroleum company has two different sources of crude oil. The first source provides crude oil that is 60% hydrocarbons, and the second one provides crude oil that is 85%hydrocarbons. In order to obtain 170 gallons of crude oil that is 65% hydrocarbons, how many gallons of crude oil must be used from each of the two sources? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551051 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=551051\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "a+b=170,<BR>\n" );
document.write( "60*a+85*b=65*170<BR>\n" );
document.write( "a=170-b<BR>\n" );
document.write( "60*(170-b)+85*b=11050<BR>\n" );
document.write( "10200-60b+85*b=11050<BR>\n" );
document.write( "25*b=850<BR>\n" );
document.write( "b=34<BR>\n" );
document.write( "a=170-b<BR>\n" );
document.write( "a=136  gal at 60%<BR>\n" );
document.write( "b=34  gal at 85%<BR>\n" );
document.write( "check<BR>\n" );
document.write( "60*136+85*34=65*170<BR>\n" );
document.write( "8160+2890=11050<BR>\n" );
document.write( "11050=11050<BR>\n" );
document.write( "ok<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );