2 3 7 x 28 July 8, 2019 16 32 64 128 3 x 7 )+ 28 9 2 x 5 2 a 3 x 7 b 28 a 3 7 x 28 5 2 10 1 3 x 7 2 =- 28 2 x 7 )= 28 3 6 x 2 x 3 y 7 2 x y 28 by 2x 7 2 3/7 x 2
