13757 + A + B = 12577 + 1357 + 7899
13757 + A + B = 13934 + 7899
13757 + A + B = 21833
A + B = 21833 - 13757
A + B = 8076
ответ: 8076.
13757 + A + B = 12577 + 1357 + 7899
13757 + A + B = 13934 + 7899
13757 + A + B = 21833
A + B = 21833 - 13757
A + B = 8076
ответ: 8076.