 Hi and welcome to the session. Let us discuss the following question which says if f of x is equal to x plus 7 and g of x is equal to x minus 7 where x belongs to r that is the set of real numbers, find f of g of 7. Let's see its solution. In the question we are given that f of x is equal to x plus 7 and g of x is equal to x minus 7 and we need to find f of g of 7. So first of all let us find f of g of x which will be equal to f of g of x. Now g of x is x minus 7 so this will be equal to f of x minus 7. Now f of x is x plus 7 so this will be equal to x minus 7 plus 7 which will be equal to x. So from this we can find f of g of 7 here we will replace x by 7 so this will be equal to 7. Thus f of g of 7 is equal to 7 and this is the required answer to this question. With this we finish this session. Hope you must have understood the question. Goodbye, take care and have a nice day.