Решите уравнение : 28-у+35=53

28-у+35=53 у=28+35-53 у=10 Ответ:10

28-у+35=53                                                                                                                28-у=53-35                                                                                                                28-у=18                                                                                                                    у=28-18                                                                                                                    у=10                                                                                                                         ----------------                                                                                                               28-10+35=53                                                                                                                        53=53