4n 15 = n July 8, 2019 16 32 64 128 4n 15n 1 is divisible by 9 4n 15n 1 chia hết cho 9 4n 15 n solutions 4n 15 = n answer Solve 4n 15 = n 5 4n n =- 15 4n 15 chia hết cho n 1 Xn 4n 15n 8 4n 2 15n 25 15n 18n 4n 3 n 4n 2 15n 4