помогите 3срочно пожалуйста

10-a=1                                                                        a-2=6

a=10-1                                                                        a=6+2

a=9                                                                                 a=8

10-9=1                                                                           8-2=6

1=1                                                                                  6=6

Ответ:9                                                                              Ответ:8