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When the units and tens digits of a certain two-digit number are reversed, the sum of the two numbers is \(121\) and the difference is \(9.\) What is the tens digit of the original number?
A. \(1\)
B. \(3\)
C. \(4\)
D. \(6\)
E. \(7\)
The OA is D
A. \(1\)
B. \(3\)
C. \(4\)
D. \(6\)
E. \(7\)
The OA is D
