DO+SI=MI
RE+MI=FA
LA+SI=SOL

Solve to get the unique answer.

Using simple deduction (and simple math):
As LA + SI = SOL, it can be deduced that S = 1, and further deduced that L = 9.
As DO + SI = MI, it can be deduced that O = 0, and further deduced that M = D+1, and A+I = 9.
A quick iteration through the remaining possibilities (not as fast as a computer's processing, but perhaps faster than the coding)  will result in the unique solution:

0 1 2 3 4 5 6 7 8 9
O S R A D M I E F L

40 + 16 = 56
27 + 56 = 83
93 + 16 = SOL

Posted by Dej Mar on 2018-04-22 00:06:34