document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=856571>Question 856571</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A frog is at the bottom of a 78 meter well. Each day he leaps 4 meters up the well. At night, while he is asleep, he slips 2 meters backwards.<BR>\n" );
document.write( "How many days does it take him to escape from the well? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #516062 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=516062\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4-2=2 1<BR>\n" );
document.write( "6-2=4 2<BR>\n" );
document.write( "8-2=6 3<BR>\n" );
document.write( "10-2=8 4<BR>\n" );
document.write( "12-2=10 5<BR>\n" );
document.write( "14-2=12 6<BR>\n" );
document.write( "16-2=14 7<BR>\n" );
document.write( "18-2=16 8<BR>\n" );
document.write( "20-2=18 9 <BR>\n" );
document.write( "22-2=20 10<BR>\n" );
document.write( "24-2=22 11<BR>\n" );
document.write( "26-2=24 12<BR>\n" );
document.write( "28-2=26 13<BR>\n" );
document.write( "30-2=28 14 <BR>\n" );
document.write( "32-2=30 15<BR>\n" );
document.write( "34-2=32 16<BR>\n" );
document.write( "36-2=34 17<BR>\n" );
document.write( "38-2=36 18<BR>\n" );
document.write( "40-2=38 19 <BR>\n" );
document.write( "42-2=40 20<BR>\n" );
document.write( "44-2=42 21<BR>\n" );
document.write( "46-2=44 22<BR>\n" );
document.write( "48-2=46 23<BR>\n" );
document.write( "50-2=48 24 <BR>\n" );
document.write( "52-2=50 25<BR>\n" );
document.write( "54-2=32 26<BR>\n" );
document.write( "56-2=34 27<BR>\n" );
document.write( "58-2=36 28<BR>\n" );
document.write( "60-2=38 29 <BR>\n" );
document.write( "62-2=40 30<BR>\n" );
document.write( "64-2=42 31<BR>\n" );
document.write( "66-2=44 32<BR>\n" );
document.write( "68-2=46 33<BR>\n" );
document.write( "70-2=48 34 <BR>\n" );
document.write( "72-2=70 35<BR>\n" );
document.write( "74-2=72 36<BR>\n" );
document.write( "76-2=74 37<BR>\n" );
document.write( "78  out 38 <BR>\n" );
document.write( "an = a + (n - 1)d<BR>\n" );
document.write( "78 = 4 + 2(n - 1)<BR>\n" );
document.write( "78 = 2n + 2<BR>\n" );
document.write( "76=2n<BR>\n" );
document.write( "38=n\r<BR>\n" );
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document.write( " \r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );