SOLUTION: howmany two digit members are possible such that the sum of their digits is equal to twise the differnce between the digits

Algebra.Com
Question 912034: howmany two digit members are possible such that the sum of their digits is equal to twise the differnce between the digits
Answer by Edwin McCravy(20063)   (Show Source): You can put this solution on YOUR website!
t+u = 2|t-u|

If t>u, t+u = 2(t-u)
        t+u = 2t-2u
         3u = t

If u>t, 3t = u  

6 such two-digit numbers:

13, 26, 39, 31, 62, 93  

Edwin
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