document.write( "Question 117406: Adult tickets for a play cost $18 and child tickets cost $2. If there were 20 people at a performance and the theater collected $88 for ticket sales, how many childern attended the play? \n" ); document.write( "
Algebra.Com's Answer #85416 by josmiceli(19441)\"\" \"About 
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C = number of children
\n" ); document.write( "A = number of adults
\n" ); document.write( "A + C = 20
\n" ); document.write( "C = 20 - A
\n" ); document.write( "18A + 2C = 88
\n" ); document.write( "18A + 2(20-A) = 88
\n" ); document.write( "18A + 40 - 2A = 88
\n" ); document.write( "16A = 48
\n" ); document.write( "A = 3
\n" ); document.write( "A + C = 20
\n" ); document.write( "C = 20 - 3
\n" ); document.write( "C = 17
\n" ); document.write( "17 children attended the play
\n" ); document.write( "check answer
\n" ); document.write( "17 + 3 = 20, so 20 people attended
\n" ); document.write( "18A + 2C = 88
\n" ); document.write( "18*3 + 2*17 = 88
\n" ); document.write( "54 + 34 = 88
\n" ); document.write( "88 = 88
\n" ); document.write( "OK
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