Mathematical Micro/Macro Economics Textbook Recommendation?

Question

I was formerly an economics major and now also majoring in mathematics.I want a textbook that is rigorously based on mathematics; not just using mathematcis whenever the author wants, but in a more unified way to explain a concept.I've learned enough mathematics in undergraduate level so mathematics will hardly be a problem. I've searched for information, but I really wanted textbooks that satisfy this specific condition; explaining concepts with sound mathematics in a unified way.Any help will be grateful.

Answer 1

For Microeconomics, try Intermediate Microeconomics by Hal Varian