document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1008600>Question 1008600</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 25% hydrocarbons and the second one provides crude oil that is 50% hydrocarbons. In order to obtain 60 gallons of crude oil that is 30% hydrocarbons how many gallons of crude oil must be used from each of the two sources\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #624200 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=624200\">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 25% hydrocarbons and the second one provides crude oil that is 50% hydrocarbons. In order to obtain 60 gallons of crude oil that is 30% hydrocarbons how many gallons of crude oil must be used from each of the two sources<BR>\n" );
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document.write( "Using 2 equations::<BR>\n" );
document.write( "Quantity:: t + f = 60 gallons<BR>\n" );
document.write( "Oil equations: 0.25t + 0.50f = 0.30*60 oil<BR>\n" );
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document.write( "Modify for eliminations::<BR>\n" );
document.write( "25t + 25f = 25*60<BR>\n" );
document.write( "25t + 50f = 30*60<BR>\n" );
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document.write( "Subtract and solve for \"f\"::<BR>\n" );
document.write( "25f = 5*60<BR>\n" );
document.write( "f = 12 gallons (amt. of 50% hydro needed)<BR>\n" );
document.write( "t = 60-12 = 48 gallons (amt. of 25% hydro needed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "first source = <BR>\n" );
document.write( "Second source =  </SPAN>\n" );
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