Question

The textbook say the answer is x=ab/a-b-c where have I gone wrong here and what is the correct way to do it?​

Answer 1

The working is attached below

Explanation:

In the working you provided, you could’ve factored out a (a+b) from every single term before isolating x. This would simplify the expression to x = ab/a-b-c.

EDIT: your working was correct until the second last line, but you could have simplified further. I have attached an example of how to do that below as well.