document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=90980>Question 90980</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this question. Three burgers and four orders of fries total $16.80. Two burgers and six orders of fries total $17.20. How much does one burger cost? How much does one order of fries cost?\r<BR>\n" );
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document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #66052 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=66052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let cost of each burger = $x and cost of each fry = $y.<BR>\n" );
document.write( "Then three burgers and four fries cost = $(3x + 4y).<BR>\n" );
document.write( "This value is equal to $16.80.\r<BR>\n" );
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document.write( "3x + 4y = 16.80 ________(1)\r<BR>\n" );
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document.write( "Also, two burgers and six fries cost = $(2x + 6y).<BR>\n" );
document.write( "This value is equal to $17.20.\r<BR>\n" );
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document.write( "2x + 6y = 17.20 ________(2)\r<BR>\n" );
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document.write( "Multiplying both sides of equation (1) by 2<BR>\n" );
document.write( "6x + 8y = 33.60 ________(3)\r<BR>\n" );
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document.write( "Multiplying both sides of equation (2) by 3<BR>\n" );
document.write( "6x + 18y = 51.60 ________(4)\r<BR>\n" );
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document.write( "Subtracting both sides of equation (3) from the respective sides of equation (4)<BR>\n" );
document.write( "18y - 8y = 51.60 - 33.60<BR>\n" );
document.write( "10y = 18<BR>\n" );
document.write( "y = 18/10 = 1.80\r<BR>\n" );
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document.write( "Substituting this value of 'y' in equation (1) we have<BR>\n" );
document.write( "3x + 4*1.80 = 16.80<BR>\n" );
document.write( "3x + 7.20 = 16.80<BR>\n" );
document.write( "3x = 16.80 - 7.20 = 9.60<BR>\n" );
document.write( "x = 9.60/3 = 3.20\r<BR>\n" );
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document.write( "Thus, each burger costs $3.20 and each fry costs $1.80. </SPAN>\n" );
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