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a group of 9 people spent $78 to go to the movies.adult tickets cost$10 each and student tickets cost $8 each.How many adult tickets were purchased?

  • math -

    Let x = adult tickets and y = student ones.

    x = 9 - y

    10x + 8y = 78

    Substitute 9-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

  • math -

    6 Student tickets X $8.00 = $48.00

    $78.00 minus the $48.00 = $30.00

    $30.00 divided by $10.00 Adult Cost = 3 adult tickets.

  • math -

    3 adult tickets

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