document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=416299>Question 416299</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help on this problem. Lisa's piggy bank contained 21 dimes, nickels, and pennies. The total in the piggy bank was $1.21. Lisa removed all the dimes from the piggy bank. This left only 41 cents in the bank. How many pennies were in the bank? I did three equations:<BR>\n" );
document.write( "d+n+p=21<BR>\n" );
document.write( "10d+5n+1p=121<BR>\n" );
document.write( "5n+1p=41<BR>\n" );
document.write( "I tried to subtract the frist two equations first, then work with the answer I got and tried to subtract the third one. Can you please show me how it's done correctly.<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 #291678 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=291678\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> d  + n+ p=21<BR>\n" );
document.write( "10d+5n+1p=121<BR>\n" );
document.write( "5n +0 +1p=41<BR>\n" );
document.write( "------<BR>\n" );
document.write( "R2 - 10R1<BR>\n" );
document.write( "R3 - 5R1<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "d  + n+ p= 21<BR>\n" );
document.write( "0  -5n-9p=-89<BR>\n" );
document.write( "0  -5n-4p=-64<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "R3-R2<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "d  + n+ p= 21<BR>\n" );
document.write( "0  -5n-9p=-89<BR>\n" );
document.write( "0  + 0+5p= 25<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "5p = 25<BR>\n" );
document.write( "p = 5 (# of pennies is 5)<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );