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14 March, 11:14

The sum of fifteen and six times a number t is 81

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Answers (2)
  1. 14 March, 11:44
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    Well the sum is 15+6=21. then you must do 81-21=60. So your answer must be t=60.
  2. 14 March, 14:31
    0
    We need to turn this phrase into an algebraic equation and then solve ...

    in math

    "of" means times (x)

    "is" means equals (=)

    "sum" means you're going to add

    The sum (we are going to add) of 15 and six times a number t (15 + 6t) is 81 ( = 81). So write it out ...

    15 + 6t = 81

    Now solve for t. First subtract 15 from each side ...

    15 + 6t - 15 = 81 - 15

    6t = 66

    Now divide each side by 6 to get t by itself ...

    6t/6 = 66/6

    t = 11

    Done!
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