document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=104831>Question 104831</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/013052316X/algebrahomeworkh>Pretice hall mathematics. Algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Suppose you bought supplies for a party. Three rolls of streamers and 15 party hats cost $30. Later, you bought 2 rolls of streamers and 4 party hats for $11. How much did each roll of streamers cost? How much did each party hat cost?\r<BR>\n" );
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document.write( "K you have to write a linear equation and then solve it. Please help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #76309 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=76309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let s=streamers, p=hats\r<BR>\n" );
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document.write( "Three rolls of streamers and 15 party hats cost $30 ... 3s+15p=30 ... s+5p=10 ... s=10-5p\r<BR>\n" );
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document.write( "you bought 2 rolls of streamers and 4 party hats for $11 ... 2s+4p=11\r<BR>\n" );
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document.write( "substituting from first equation to second ... 2(10-5p)+4p=11 ... 20-10p+4p=11 ... -6p=-9\r<BR>\n" );
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document.write( "solve for p and substitute back to find s </SPAN>\n" );
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