document.write( "Question 124080: include systems of equations for solving\r
\n" ); document.write( "\n" ); document.write( "Adult tickets for a play cost $14 and child tickets cost $3. If there were 26 people at a performance and the theater collected $199 from tickets, how many adults and how many children attended the play?
\n" ); document.write( "

Algebra.Com's Answer #91117 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Adult tickets for a play cost $14 and child tickets cost $3. If there were 26 people at a performance and the theater collected $199 from tickets, how many adults and how many children attended the play?
\n" ); document.write( ":
\n" ); document.write( "Let a = no. of adults
\n" ); document.write( "and
\n" ); document.write( "Let c = no. of children
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement/phrase:
\n" ); document.write( "\"If there were 26 people at a performance\"
\n" ); document.write( "a + c = 26
\n" ); document.write( "Subtract a from both sides:
\n" ); document.write( "c = (26-a); we can use this for substitution:
\n" ); document.write( ":
\n" ); document.write( "\"Adult tickets for a play cost $14 and child tickets cost $3...the theater collected $199 from tickets,\"
\n" ); document.write( " 14a + 3c = $199
\n" ); document.write( ":
\n" ); document.write( "how many adults and how many children attended the play?
\n" ); document.write( ":
\n" ); document.write( "Substitute (26-a) for c in the above equation, find a
\n" ); document.write( "14a + 3(26-a) = 199
\n" ); document.write( "14a + 78 - 3a = 199
\n" ); document.write( "14a - 3a = 199 - 78
\n" ); document.write( "11a = 121
\n" ); document.write( "a = \"121%2F11\"
\n" ); document.write( "a = 11 adults
\n" ); document.write( ":
\n" ); document.write( "We know c = (26-a); substitute 11 for a
\n" ); document.write( "c = 26 - 11
\n" ); document.write( "c = 15 children
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solutions in the $$ equation
\n" ); document.write( "14a + 3c = $199
\n" ); document.write( "14(11) + 3(15) =
\n" ); document.write( "154 + 45 = 199; confirms our solutions
\n" ); document.write( "
\n" );