Сокровища родной природы которые дороги мне

Помогите решить пожалуйсто..

20/(x-2)+20/(x+2)=7/4

ответить на вопросы по английски
1)Have you ever earned any money ? When was it ? What did you do? 2)Do you think teenagers should work and earn money? Why? 3)What can you see when you look from the window of your room? 4)What newspapers are published and sold at the place where you live? 5)What do you prefer to buy: cheap clothes that you can change rather often or expensive clothes that will last for longer time?Why? 6)Do you type your letters when you want to send them or do you generally write them ?Why? 7)Articles on what subjects interest you most?Where do you find them?

Стороны треугольника равны 12,13,14.Найти радиус описанной окружности