document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924074>Question 924074</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One day a store sold 21 sweatshirts.  White ones cost $10.95 and yellow ones cost $12.50. In all, $248.55 worth of sweatshirts were sold.  How many of each color were sold?\r<BR>\n" );
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document.write( "(-10.95)x+y=21 -> x=21-y\r<BR>\n" );
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document.write( "10.95x+12.50y=248.55<BR>\n" );
document.write( "-10.95x-10.95y=229.95<BR>\n" );
document.write( "1.55y=478.50<BR>\n" );
document.write( "y=308.7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560593 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=560593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = number of white ones<BR>\n" );
document.write( "y = number of yellow ones\r<BR>\n" );
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document.write( "x + y = 21 (first equation)\r<BR>\n" );
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document.write( "10.95x + 12.50y = 248.55 (second equation)\r<BR>\n" );
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document.write( "from the first equation, solve for y to get y = 21 - x\r<BR>\n" );
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document.write( "in the second equation, replace y with 21 - x to get:\r<BR>\n" );
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document.write( "10.95x + 12.50(21-x) = 248.55\r<BR>\n" );
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document.write( "simplify to get:\r<BR>\n" );
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document.write( "10.95x + 262.5 - 12.50x = 248.55\r<BR>\n" );
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document.write( "combine like terms and subtract 262.5 from both sides of the equation to get:\r<BR>\n" );
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document.write( "-1.55x = -13.95\r<BR>\n" );
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document.write( "solve for x to get:\r<BR>\n" );
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document.write( "x = 9\r<BR>\n" );
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document.write( "that makes y = 12 because 12 + 90 = 21\r<BR>\n" );
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document.write( "your solution is that x = 9 and y = 12\r<BR>\n" );
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document.write( "that means that:\r<BR>\n" );
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document.write( "the store sold 9 white ones and 12 yellow ones.\r<BR>\n" );
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document.write( "9 * 10.95 + 12 * 12.50 = 248.55\r<BR>\n" );
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document.write( "your two equaitons had to be:\r<BR>\n" );
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document.write( "x + y = 21<BR>\n" );
document.write( "that equation told you the number of shirts that were sold had to be equal to 21.\r<BR>\n" );
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document.write( "the other equation had to be:\r<BR>\n" );
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document.write( "10.95x + 12.50y = 248.55\r<BR>\n" );
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document.write( "that equation told you the total price for each type of shirt had to total up to 248.55.\r<BR>\n" );
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document.write( "total price for white shirt is 10.95 each times the number of white shirts.\r<BR>\n" );
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document.write( "total price for yellow shirts is 12.5 each times the number of yellow shirts.\r<BR>\n" );
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document.write( "by shirts, i mean sweatshirts.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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