https://worthwhile.typepad.com/worthwhile_canadian_initi/2019/05/accounting-identities-and-the-implicit-theory-of-inertia.html
Animals can be divided into Carnivores and Non-Carnivores: A = C + NC. Therefore, if we add some wolves to an island of sheep, the number of animals on that island will increase
Here are two more examples:
1. Y = C + I + G + X – M. Therefore an increase in Government spending will increase GDP.
2. Y = C + S + T. Therefore an increase in Taxes will increase GDP.