document.write( "Question 128200: the tickets to a concert cost $16.30 for the lower level and $5.50 for the upper level. A total of 16400 tickets were sold for a total amount of $183,080 How many upper level tickets were sold? \n" ); document.write( "
Algebra.Com's Answer #93877 by ozymandias(9)\"\" \"About 
You can put this solution on YOUR website!
Call the number of upper tickets = u\r
\n" ); document.write( "\n" ); document.write( "Since the total number of seats is 16400, the number of lower level musr be 16400-u\r
\n" ); document.write( "\n" ); document.write( "So 5.5u + 16.3(16400-u) = 183080\r
\n" ); document.write( "\n" ); document.write( "5.5u -16.3u + 267320 = 183080\r
\n" ); document.write( "\n" ); document.write( "10.8u = 84240\r
\n" ); document.write( "\n" ); document.write( "So u (upper seats) = 7800\r
\n" ); document.write( "\n" ); document.write( "And hence the number of lower seats is 8600.
\n" ); document.write( "
\n" );