Х-635=196
Х=196+635
Х=831
–---------------
831-635=199
199=199
Х+209=695
Х=695-209
Х=486
---------------
486+209=695
695=695
Х+(69+212)=705
Х+281=705
Х=424
-----------------
424+(69+212)=705
705=705
Х-517=219+125
Х-517=344
Х=344+517
Х=861
---------------
861-517=219+125