помогите решить уравнение и найди корень 480:у-19=41

Города А, В и С соединены прямолинейным шоссе, причем город В расположен между городами А и С. Из города А в сторону города С выехал легковой автомобиль, и одновременно с ним из города В в сторону С выехал грузовик. Через сколько часов после выезда легковой автомобиль догонит грузовик, если скорость легкового автомобиля на 28 км/ч больше скорости грузовика , а расстояние между городами А и В равно 112 км?

Проверьте пожалуйста:) Из прямой речи в косвенную

1) Mabel said : ' As soon as you come to our town , visit my house and stay for a couple of days.' - Mabel said as soon as he came to their town she asked him to visit her house and stay for a couple of days

2). 'You are able to solve this problem alone without any outside help,' said Monica to Jess. - Monica said  to Jess she were able to solve that problem alone without any outside help.

3). 'If I tell you my real name you will laugh,' she said. - She told him that he would laugh if she told him her real name.

4). 'You must copy this text and mark all the grammatical mistakes in it,' said the
teacher. - The teacher said I had copy that text and mark all the the grammatical mistooks in it.

5). 'I shall miss you when you leave for Paris,' said Alice to Meg. - Alice said to Meg she would  miss her when she left for Paris.

6). 'I did not mean to hurt you. I only wanted to tell you what he had always

concealed,' said Marsha. - Marsha said she has not meant to hurt him, she only has wanted to tell himwhat he had always  concealed.

7).'My house is your house whenever you need it,' said Lizzy. - Lizzy said her house was our house whenever we need it.

Огромное спасибо)