Question

решите уравнения (8х+91):7=21

Answer 1

(8х+91):7=21
8х+91=21х7
8х+91=147
8х=147-91
8х=56
х=56:8
х=7
Ответ:7

Answer 2

(8х+91):7=21
8х+91=21*7
8х+91=147
8х=147-91
8х=56
х=56:8
х=7