document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=975820>Question 975820</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 <BR>\n" );
document.write( "50%<BR>\n" );
document.write( " hydrocarbons, and the second one provides crude oil that is <BR>\n" );
document.write( "75%<BR>\n" );
document.write( " hydrocarbons. In order to obtain <BR>\n" );
document.write( "140<BR>\n" );
document.write( " gallons of crude oil that is <BR>\n" );
document.write( "60%<BR>\n" );
document.write( " hydrocarbons, how many gallons of crude oil must be used from each of the two sources?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #597479 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=597479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A petroleum company has two different sources of crude oil. The first source provides crude oil that is 50% hydrocarbons, and the second one provides crude oil that is 75% hydrocarbons. <BR>\n" );
document.write( "In order to obtain 140 gallons of crude oil that is 60% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?<BR>\n" );
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document.write( "Equation::<BR>\n" );
document.write( "carbon + carbon = carbon<BR>\n" );
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document.write( "0.50x + 0.75(140-x) = 0.60*140<BR>\n" );
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document.write( "50x + 75*140 - 75x = 60*140<BR>\n" );
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document.write( "-25x = -15*140<BR>\n" );
document.write( "x = (3/5)140<BR>\n" );
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document.write( "x = 3*28<BR>\n" );
document.write( "x = 84 gallons (amt of 50% oil needed)<BR>\n" );
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document.write( "140-x = 56 gallons (amt of 75% oil needed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "--------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );