Question 916238
t = u = 11  0r t = {{{11-u}}}
10u + t = 10t + u - 9
10u + (11-u) = 10(11-u) + u  - 9  
|Simplify
18u = 90
 u = 5  and t = 6 {{{11-5}}}
Number 65
....
And...checking
 56 = 65 - 9