document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=762763>Question 762763</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A gas station sells regular gas for $2.25 per gallon and premium gas for $2.85 a gallon. At the end of a business day 340 gallons of gas were sold, and receipts totaled $819. How many gallons of each type of gas were sold?<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 #464297 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=464297\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Regular gas = x<BR>\n" );
document.write( "Premium gas = y<BR>\n" );
document.write( "x + y = 340...1<BR>\n" );
document.write( "2.25x + 2.85y = 819...2<BR>\n" );
document.write( "Multiply (1) by 9<BR>\n" );
document.write( "and (2) by 4<BR>\n" );
document.write( "9x + 9y = 3060...3<BR>\n" );
document.write( "9x + 11.4y = 3276...4<BR>\n" );
document.write( "Subtract (3) from (4)<BR>\n" );
document.write( "     2.4y = 216<BR>\n" );
document.write( "        y = 90<BR>\n" );
document.write( "Substitute y = 90 into (1)<BR>\n" );
document.write( "x + y = 340<BR>\n" );
document.write( "x + 90 = 340<BR>\n" );
document.write( "     x = 340 - 90<BR>\n" );
document.write( "     x = 250<BR>\n" );
document.write( "Regular gas - 250 gallons<BR>\n" );
document.write( "Premium gas - 90 gallons<BR>\n" );
document.write( "Hope this helps.<BR>\n" );
document.write( ":-) </SPAN>\n" );
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