3 10x 4x 18 July 8, 2019 16 32 64 128 10x 5 4x 3 180 4x 15 10x 3 180 9x 13 10x 3 4x 2 180 5x 4 10x 3 4x 2 18x 9 3 4x + 2 18 = 10