N 4 5 n 6 1 2 July 8, 2019 16 32 64 128 N 4 5 n 6 1 2 solve 21 n 4 5 n 6 1 2 N upon 4 5 n 6 1 upon 2 N 4 5 9 6 1 2 N-3 5 + and-4 7 = 6-2n-1 35 6) 4(5 - n) - 3(2n + 7) = 0
