Răspuns:
a+b+c+d+e = 26
Explicație pas cu pas:
___ ___ ___
abc+dbc+ebc=1916 <=>
100a+10b+c+100d+10b+c+100e+10b+c = 1916 =>
100a+30b+3c+100d+100e = 1916
100(a+d+e) + 30b + 3c = 1916
3c = 6 => c = 2
30b + 3c = 116 => 30b = 110 => b ∉ N
=> 30b = 210 => b = 7
=> 100(a+d+e) = 1916-216 = 1700 =>
a+d+e = 17 =>
a+b+c+d+e = 17+7+2 = 26
#copaceibrainly
