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March 30, 2017

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the number of photos taken is a two-digit number. the sum of the number is 11. The tens digit is 3 more than the ones digit. How many photos were taken

  • Math - ,

    Numbers that add up to 11:

    29, 38, 47, 56, 65, 74, 83, 92

  • Math - ,

    tens digit + ones digit = 11

    tens digit = 3 + ones digit

    t + x = 11
    t = 3 + x

    substitute: 3 + x + x =11

    3 + 2x = 11

    Solve for x which represents the one's digit. Then find the tens digit.

  • Math - ,

    47

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