document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=488315>Question 488315</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many cups of grapefruit juice must be added to 30 cups of a punch that is 8% grapefruit juice to obtain a punch that is 10% grapefruit juice? <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 #333346 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=333346\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How many cups of grapefruit juice must be added to 30 cups of a punch that is 8% grapefruit juice to obtain a punch that is 10% grapefruit juice? \r<BR>\n" );
document.write( "\n" );
document.write( "-------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "grape + grape = grape<BR>\n" );
document.write( "----<BR>\n" );
document.write( "x + 0.08*30 = 0.10(x+30)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "100x + 8*30 = 10x + 10*30<BR>\n" );
document.write( "90x = 2*30<BR>\n" );
document.write( "x = 2/3 of a cup of 100% grapejuice must be added.<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );