document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=210714>Question 210714</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose a fuel mixture is 7% ethanol and 93% gasoline. How much ethanol (in gallons) must you add to one gallon of fuel so that the new fuel mixture is 10% ethanol? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159184 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=159184\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose a fuel mixture is 7% ethanol and 93% gasoline. How much ethanol (in gallons) must you add to one gallon of fuel so that the new fuel mixture is 10% ethanol?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "7%ethanol + 100%ethanol = 10%ethanol<BR>\n" );
document.write( "0.07(1 gal) + 100%(x gal) = 0.10(1+x)gal<BR>\n" );
document.write( "7 + 100x = 10(1+x)<BR>\n" );
document.write( "7 + 100x = 10+10x<BR>\n" );
document.write( "90x = 3<BR>\n" );
document.write( "x = 0.0333.. gallons (amount of 100% ethanol that must be added)<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );