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17 January, 10:55

15 more than 3 times a number is at most 7

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  1. 17 January, 12:07
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    Let x = the number

    "Fifteen more than" means addition

    "Three times a number" is multiplication

    "three less than" is subtraction, as is the term difference

    Putting it all together, we have

    7 - (15 + 3x) = (9 - 5x) - 3

    -8 + 3x = 6 - 5x

    -8 = 6 - 8x

    -14 = - 8x

    14/8 = 7/4 = x
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