2 4 x 8 13 July 8, 2019 16 32 64 128 1 2 5 4 x 8 13 2 5x 1 4 x 8 )= 13 2 4 x 13 8 82 2 x 4 2 x 13 2^x + 8^x = 130 2 x 4 1/8