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movie tickets cost $10 for adults and $8 for children. The total sales form 120 tickets was $1120. how many adult tickets were sold?

  • math -

    A + C = 120
    10 A + 8 C = 1120

    Solve that pair of equations for the two unknowns
    C = 120 - A
    10 A + 960 -8A = 1120
    2A = 160
    A = 80
    C = 40

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