MCQ Practice Mathematics 📖 Xy = yx, x = 2y ( x ≠0, y≠0) কত? Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up This question appeared in Primary Recruitment Model Test 2021 (04) Question 17