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Math 156

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two 2-digit numbers have the same digits. Their sum is 77 and their difference is 27. What are the numbers? What stratagey did u use?

  • Math 156 - ,

    x1 + x2 = 77
    x2 - x1 = 27

    x2 = 27 + x1
    x1 + (27 + x1) = 77
    2 x1 = 50
    x1 = 25
    x2 = 52

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