document.write( "Question 505956: Tickets for a school play sell for $8 for floor seats and $6 for
\n" ); document.write( "balcony seats. For one performance 72 tickets are sold, bringing in $516.
\n" ); document.write( "How many of each ticket are sold?
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Algebra.Com's Answer #340051 by Maths68(1474)\"\" \"About 
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Let
\n" ); document.write( "Floor seats = f
\n" ); document.write( "Cost of 8 tickets = 8*f = 8f
\n" ); document.write( "Balcony seats = b
\n" ); document.write( "Cost of 6 Balcony seats = b = 6*b = 6b\r
\n" ); document.write( "\n" ); document.write( "Given\r
\n" ); document.write( "\n" ); document.write( "Floor seats + Balcony seats = Total tickets sold
\n" ); document.write( "f + b = 72
\n" ); document.write( "f=72-b ...............(1) \r
\n" ); document.write( "\n" ); document.write( "Amount of tickets sold = Cost of 8 tickets + Cost of 6 Balcony seats
\n" ); document.write( "516=8f+6b ...........(2)
\n" ); document.write( "Put the value of f from (1) to (2)
\n" ); document.write( "516=8(72-b)+6b
\n" ); document.write( "516=576-8b+6b
\n" ); document.write( "516-576=-2b
\n" ); document.write( "-30=-2b
\n" ); document.write( "Divide by (-2) both sides of the equation
\n" ); document.write( "-30/-2=-2b/-2
\n" ); document.write( "30=b
\n" ); document.write( "b=30\r
\n" ); document.write( "\n" ); document.write( "Put the value of b in (1)
\n" ); document.write( "f=72-b ...............(1)
\n" ); document.write( "f=72-30
\n" ); document.write( "f=42\r
\n" ); document.write( "\n" ); document.write( "Floor seats tickets = f = 8
\n" ); document.write( "Cost of 8 tickets = 8*f = 8f = 8*42 = $336
\n" ); document.write( "Balcony seats tickets = 30
\n" ); document.write( "Cost of 6 Balcony seats = b = 6*b = 6b=6*30=$180
\n" ); document.write( "Amount of tickets sold = Cost of 8 tickets + Cost of 6 Balcony seats
\n" ); document.write( "516=336+180
\n" ); document.write( "516=516\r
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