SOLUTION: When you reverse the digits in a certain two-digit number you decrease its value by 9. What is the number if the sum of its digits is 13?

Question 989101: When you reverse the digits in a certain two-digit number you decrease its value by 9. What is the number if the sum of its digits is 13?

Found 2 solutions by zhagi17, josmiceli:
Answer by zhagi17(16) (Show Source): You can put this solution on YOUR website!
76
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let the units digit =
Let the tens digit =
--------------------------
given:
(1)
(2)
------------------------------
(2)
(2)
------------------
Add (1) and (2)
(1)
(2)
-------------------

and
(2)
(2)
(2)
(2)
-------------------
The number is 76
-------------------
check:
Reverse the digits: 67

and

OK
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