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2014-10-14T21:01:13+03:00

100a+10b+c -10a - b - c = 486        90a +9b = 486     10a + b = 54 ⇒a=5 b=4    c ∈{o,1,2,3,4,5,6,7,8,9}   de ex. 547 - 54 - 7 = 486