I'm not sure exactly what this question means, so I'm guessing that the given sum is in a base other than decimal. I also assume that in decimal we have the same digit in the hundreds, tens and ones.
Assume base b.
4b+6+b+3b+2=111x.
8b+8=111x.
b+1=111x/8, so x=8 and b+1=111, b=110.
CHECK
(4*110+6)+110+(3*110+2)=446+110+332=888.