algebra

Tom played five rounds of golf and shot an average score of 72. If he excluded the lowest score, however, his average for the other four rounds was 74. what was Tom's lowest score in the five rounds?
PLEASE EXPLAIN HOW

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  1. test 1=74
    test 2=74
    test 3=74
    test 4=74
    test 5=64

    average of all 5 is 72.

    average of first 4 is 74.

    just have to find a # divisible by 5 that equals 72 when divided by 5

    Then find a # divisible by 4 that equals 74 when divided by 4

    take the difference, theres your answer.

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  2. total of his 5 games = 5(72) = 360
    total of his top 4 games = 4(74) = 296
    lowest game = 360-296 = 64

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