Răspuns :
a - b = 103
a : b = 6 rest 3
a = 6b + 3
6b + 3 - b = 103
5b = 103 - 3
b = 100 : 5
b = 20
a = 103 + 20
a = 123
a : b = 6 rest 3
a = 6b + 3
6b + 3 - b = 103
5b = 103 - 3
b = 100 : 5
b = 20
a = 103 + 20
a = 123