Răspuns :
a - b = 271
a : b = 7 rest 13
a = 7b + 13
7b + 13 - b = 271
6b = 271 - 13
6b = 258
b = 258 : 6
b = 43
a = 271 + 43
a = 314
b __/
a __/__/__/__/__/__/__/ + 13
a : b = 7 rest 13
a = 7b + 13
7b + 13 - b = 271
6b = 271 - 13
6b = 258
b = 258 : 6
b = 43
a = 271 + 43
a = 314
b __/
a __/__/__/__/__/__/__/ + 13