Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Economics Stack Exchange is a question and answer site for those who study, teach, research and apply economics and econometrics. It only takes a minute to sign up.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
First equation Dynamic Aggregate Demand
How the derive from second equation the first one?
I recommend multiplying first eq by the only nominator in eq, then performing additions and subtractions.
These operations are reversible.
Required, but never shown