Решите уравнение а)а-389=4621 б)887+х=1201 в)73•у=438 г)140: t=4

а-389=4621                     73ху=438

                                         у=438:7

а=4621+389                       у=6

а=5010                             73х6=438

5010-389=4621                438=438

                                            140:т=4

                                             т=140:4

887+х=1201                         т=35

х=1201-887                           140:35=4

887+314=1201                        4=4

1201=1201