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5 December, 05:45

The sum of 3 number is 80. the third number is 3 times the first. the first number is 5 less the second. what are the numbers

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  1. 5 December, 07:50
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    1st number = x-5

    2nd number = x

    3rd number = 3x-15

    Total = 80

    x-5+x+3x-15=80

    5x-20=80

    5x=100

    x=20

    The numbers are 20, 15, 45
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