The sum of a 2 digit number is 7. Whe the digits are reversed the number increases by 27. Find the original number.
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https://www.meritnation.com/ask-answer/question/1-in-a-2-digit-number-the-face-value-of-the-digit-in-th/equations-and-inequations/1495602
https://www.meritnation.com/ask-answer/question/1-in-a-2-digit-number-the-face-value-of-the-digit-in-th/equations-and-inequations/1495602