Question 128913
let a,b,c the amounts
then 
1) a+b+c=400
2) a+b=286
3) b+c=230

using the first equation and the second 286+c=400 then c=114
using the third equation b+114=230 then b=116 then a+116=286
then a=170

R: amounts are 170,116 and 114