a : b = 1 rest 4
a = b+4
c : (a+b) = 2 rest 4
c = 2(a+b)+4 =>c =2(b+4+b)+4
==> c = 4b+8+4 ==> c = 4b+12
(a+c) -b = 100
b+4+4b+12 -b = 100
4b = 100-16
4b = 84
b = 84:4
b = 21
c = 4×21+12 = 84+12=96
a =21+4 = 25
a = 25
b = 21
c = 96
verificare:
25+96-21 = 100
25:21 = 1 rest 4
96: (25+21) = 96 : 46 = 2 rest 4