document.write( "Question 521779: the cost of an adult ticket for the school play is 2.00. the cost of a student ticket is 1.50 the total income from the sale of tickets was 550.00. the number of adult tickets sold was 100 less than 3 times the number of student tickets sold. how many of each type of ticket was sold? systems of linear equations\r
\n" ); document.write( "\n" ); document.write( "i got the equations 2.00x+1.50y=550.0
\n" ); document.write( " x=3(times)y-100
\n" ); document.write( "im solving for substitution and i dont know what to do with the multiplication
\n" ); document.write( "

Algebra.Com's Answer #346579 by stanbon(75887)\"\" \"About 
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the cost of an adult ticket for the school play is 2.00. the cost of a student ticket is 1.50 the total income from the sale of tickets was 550.00. the number of adult tickets sold was 100 less than 3 times the number of student tickets sold. how many of each type of ticket was sold? systems of linear equations
\n" ); document.write( "i got the equations
\n" ); document.write( "---------------------
\n" ); document.write( "2.00x+1.50y=550.0
\n" ); document.write( "x=3(times)y-100
\n" ); document.write( "------------
\n" ); document.write( "substitute for \"x\" and solve for \"y\":
\n" ); document.write( "2(3y-100) + 1.5y = 550
\n" ); document.write( "6y -200 + 1.5y = 550
\n" ); document.write( "7.5y = 750
\n" ); document.write( "y = 100 (# of student tickets sold)
\n" ); document.write( "----
\n" ); document.write( "Solve for \"x\":
\n" ); document.write( "x = 3y-100
\n" ); document.write( "x = 200 (# of adult tickets sold)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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