MCQ Practice Mathematics 📖 3x+4 = 3.9x হলে x = কত? A 2 B 3 C 4 D 9 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 Previous3x + 3x + 3x = কত? Next3x-n - 5x-n = 0 হলে x = কত?