(468-104)+364=519 234+у=452 378-b=165 (39+x)-84=78
(x-83)+316=425 (600-x)-92=126

234+y=452

y=452-234

y=218

378-b=165

-b=165-378

b-213

39+x-84=78

x=78-39+84

x=123

x-83+316=425

x=425+83-316

x=192

600-x-92=126

-x=126-600+92

x=382

234+y=452y=452-234y=218378-b=165-b=165-378b-21339+x-84=78x=78-39+84x=123x-83+316=425x=425+83-316x=192600-x-92=126-x=126-600+92x=382