document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1188503>Question 1188503</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Graduation dinner cost $18 for general adults and only $16 for children. Graduation ticket sales total is $3600.\r<BR>\n" );
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document.write( "Write an equation that models this situation where a adults at the graduation dinner and c represents children at the graduation dinner. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #819611 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52803)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=819611\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
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document.write( "With the given input data, we can write only one equation for two unknown \"a\" and \"c\".\r\n" );
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document.write( "This equation is the revenue equation\r\n" );
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document.write( "    18a + 16c = 3600  dollars.\r\n" );
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document.write( "Having this equation only is not enough to solve the problem and to determine the unknowns.\r\n" );
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document.write( "For it, the second equation is necessary.\r\n" );
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document.write( "Usually, the second equation is for the total tickets sold;\r\n" );
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document.write( "but in this problem this total is not given; therefore, the second equation can not be attached.\r\n" );
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document.write( "On tickets problems, &nbsp;see the lesson\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/coordinate/lessons/Using-systems-of-equations-to-solve-problems-on-Tickets.lesson>Using systems of equations to solve problems on tickets</A> \r<BR>\n" );
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document.write( "explaining and showing different methods of solving such problems.\r<BR>\n" );
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document.write( "From this lesson, &nbsp;learn on how to solve such problems once and for all.\r<BR>\n" );
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document.write( "Also, &nbsp;you have this free of charge online textbook in ALGEBRA-I in this site\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.\r<BR>\n" );
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document.write( "The referred lesson is the part of this online textbook under the topic \"<U>Systems of two linear equations in two unknowns</U>\".\r<BR>\n" );
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document.write( "Save the link to this online textbook together with its description\r<BR>\n" );
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document.write( "Free of charge online textbook in ALGEBRA-I<BR>\n" );
document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r<BR>\n" );
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document.write( "to your archive and use it when it is needed.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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