document.write( "Question 60876: Adult tickets cost $18.00 children cost $8.00 there were 21 people total at the theatre and they collected $288.00 how many children attended? \n" ); document.write( "
Algebra.Com's Answer #41830 by joyofmath(189)\"\" \"About 
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Let the cost of admission be: \"C%5BA%5D+=+18\" and \"C%5BC%5D+=+8\"
\n" ); document.write( "Let the number of adults = \"A\" and the number of children = \"C\"\r
\n" ); document.write( "\n" ); document.write( "Then \"A+%2B+C+=+21\" as there were 21 people.
\n" ); document.write( "And \"A%2AC%5BA%5D+%2B+C%2AC%5BA%5D+=+288\" as $288 was collected.\r
\n" ); document.write( "\n" ); document.write( "So, \"18A+%2B+8C+=+288\"\r
\n" ); document.write( "\n" ); document.write( "Since, \"A+%2B+C+=+21\", \"C+=+21+-+A+\"\r
\n" ); document.write( "\n" ); document.write( "So, \"18A+%2B+8%2821+-+A%29+=+288\"
\n" ); document.write( "Or, \"18A+%2B+168+-+8A+=+288\"
\n" ); document.write( "Or, \"10A+%2B+168+=+288\"
\n" ); document.write( "Or, \"10A+=+120\"
\n" ); document.write( "So, \"A+=+12\"
\n" ); document.write( "So, There were 12 adults and since there were 21 people altogether there were 9 children.\r
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\n" ); document.write( "\n" ); document.write( "Verify this answer by plugging in \"A+=+12\" and \"C+=+9\" in \"A%2AC%5BA%5D+%2B+C%2AC%5BA%5D+=+288\"\r
\n" ); document.write( "\n" ); document.write( "\"12+%2A+18+%2B+9+%2A+8\" should = 288.
\n" ); document.write( "\"12+%2A+18+=+216\"
\n" ); document.write( "\"9+%2A+8+=+72\"
\n" ); document.write( "\"216+%2B+72\" does indeed = 288.
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