(х-9)·24=24(х-9)=24·x-24·9=24х-216
21·(38-b)=21·38-21·b=798-21b
(у+4)·38=38(y+4)=38·y+38·4=38y+152
(х-9)*24=24х-24*9
21*(38-b)=21*38-21*b
(y+4)*38=38y+38*4
(х-9)·24=24(х-9)=24·x-24·9=24х-216
21·(38-b)=21·38-21·b=798-21b
(у+4)·38=38(y+4)=38·y+38·4=38y+152
(х-9)*24=24х-24*9
21*(38-b)=21*38-21*b
(y+4)*38=38y+38*4