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7 March, 12:27

Movie tickets for an adult and three children cost $20. an adult's ticket costs $2 more than a child's ticket. find the cost of an adult's ticket.

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  1. 7 March, 12:45
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    A - price of adult's ticket

    c - price of children's ticket

    a+3c=20

    a=c+2

    c=a-2

    a+3 (a-2) = 20

    a+3a-6=20

    4a=26

    a=6.5

    The cost of an adult's ticket is $6.50
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