(643 - х)+254=354
543 
(1264 - х)- 384 = 337

(512 - х)+183=427

(х - 182)+674 =760
(х -205)+306=369
(х - 324)+215=493
(х - 415) - 108=89
612
(734 - х)+654=776
(985 - х)+113 = 486
(х+365) - 408=69
(Х+420) - 118=414
112
(315 - х)+216=419
(520 - х)+413=821