4 2 7 x 21 July 8, 2019 16 32 64 128 2 3 4 7 x 11 21 2 7 x 7 16 21 4 4 x y 21 2 7 4 7 x 4 7 x 21 2 divided by 10 4 7 x 4 7 x 21 2 10 21x 4 14x 2 7x 7 * x 3 3 4 7 8 x 21 2 7 x 2 )= 4 x 1 )- 21
