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4 February, 10:45

admission to a county fair costs 20 for two adults and one child and 16 for one adult and two children. what is the cost for one adult?

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  1. 4 February, 11:12
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    cost of 1 adult = 8

    Explanation:

    two adults and one child = = 20

    one adult and two children = = 16

    what is the cost for one adult?

    2 adults + 1 child = = 20

    1 adult and 2 children = = 16

    if 1 adult price is x and let 1 children be y

    2x + y = 20 ... (1)

    x + 2y = 16 ... (2)

    using simultaneous equation of substitution method

    eqn (1) becomes y = 20 - 2x ... (3)

    input eqn (3) in (2)

    x + 2 (20 - 2x) = 16 ... (4)

    x + 40 - 4x = 16

    40 - 3x = 16

    -3x = 16 - 40 = - 24

    x = = 8

    since x equal 8

    therefore, cost of 1 adult = 8
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