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In the two-digit number x, both the sum and the difference of its digits ... ...

In the two-digit number x, both the sum and the difference of its digits is 4. What is the value of x?
(A)    13
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Problem Set F: Number Theory

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Replies to This Thread: 1 | ----
In the two-digit number x, both the sum and the difference of its digits ... ... 
Posted: 06/02/2013 12:20
Explanation...
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Posted: 06/06/2013 23:20
Did you see the explanation? There is an explanation for every question, you know. After you submit the answer, choose Show Solution. I can't explain this better than the Explanation in the app's Show Solution.
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