Question 1090317
The number, 10t+u;
Reversed its digits, t+10u;
Sum of digits is 7, t+u=7.


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reverse the digits in a certain two-digit number you decrease its value by 27.
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{{{system(10t+u-t-10u=27,t+u=7)}}}


{{{system(t-u=3,t+u=7)}}}


The digits:  {{{system(t=5,u=2)}}}
Number: 52