А) а + 5435 = 7002, х - 6308 = 698, 1111 - m = 222,
а = 7002 - 5435, х = 6308 + 698, m = 1111 - 222,
а = 1567. х = 7006. m = 889.
б) 60123 + с = 9321, 315 - х =315, n - 486 = 1518,
с = 9321 - 60123, х = 315 - 315, n = 1518 + 486,
с = - 50802. х = 0. n = 2004.