389+( х-47) =819 ( х+631)-567=666

Question

389+( х-47) =819 ( х+631)-567=666

Answer 1

Ответ





Ответ

Answer 2

389+(х-47)=819
(х-47)=819-389
(х-47)=430
х=430+47
х=477

(х+631)-567=666
(х+631)=666-567
(х+631)=99
х=631-99
х=532