А)23х+456=732
23х=732-456
23х=276
х=276÷23
х=12
(х÷68)+6750=7702
х÷68=7702-6750
х÷68=952
х=952×68
х=64736
(67809-7896)+у=462502
59913+у=462502
у=462502-59913
у=402589
б)1000000-(89×а)=956479
89а=1000000-956479
89а=43521
а=43521÷89
а=489
х-(2208÷32)=8090
х-69=8090
х=8090+69
х=8159
67х-10986=21777
67=21777+10986
67х=32763
х=32763÷67
х=489