Помогите 3срочно пожалуйста

а=10-1 а=9 и а=6+2 а=8 вот так надо

10-a=1                                                                        a-2=6 a=10-1                                                                        a=6+2a=9                                                                                 a=810-9=1                                                                           8-2=61=1                                                                                  6=6Ответ:9                                                                              Ответ:8