document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=242412>Question 242412</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Andea's car averages 18.4 mi/gal in city driving and 25.8 mi/gal in highway driving. if she drove a total of 652.0 mi on 29 gal of gas, how many of the gallons were used for city driving?\r<BR>\n" );
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document.write( "i think this a system of equations problem. i don't know how to set up the equations </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #177531 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=177531\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> YOU DON'T NEED A SYSTEM OF EQUATIONS;<BR>\n" );
document.write( "THE FOLLOWING ONE WILL DO.<BR>\n" );
document.write( "18.4X+25.8(29-X)=652<BR>\n" );
document.write( "18.4X+748.2-25.8=652<BR>\n" );
document.write( "-7.4X=652-748.2<BR>\n" );
document.write( "-7.4X=-96.2<BR>\n" );
document.write( "X=-96.2/-7.4<BR>\n" );
document.write( "X=13 GAL CONSUMMED @ 18.4 MPH. CITY DRIVING.<BR>\n" );
document.write( "29-13=16 GAL CONSUMMED @ 25.8 MPH.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "18.4*13+25.8*16=652<BR>\n" );
document.write( "239.2+412.8=652<BR>\n" );
document.write( "652=652<BR>\n" );
document.write( " </SPAN>\n" );
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