2x 5 x x 15 10 3 July 8, 2019 16 32 64 128 2x 7 5 x 3 10 x 1 15 0 3x 15 2x 10 x 5 4 2x 5 )- 3 x 10 )=- 15 3x 10 2x 5 x 15 130 2x 5 2 x 2 5
